Full-mesh seat and split back with lumbar that adjusts in height and depth, 3D armrests and a headrest — rated to 330 lb, sized best for small-to-average frames.
Buy if you run warm and want airflow through the seat as well as the back, with a lumbar support you can actually move (height and depth), 3D armrests and an adjustable headrest on an aluminum base — owners and hands-on reviewers praise the support once the firm mesh breaks in, and the chair is rated to 330 lb.
Skip if you are around six feet or taller (owners that height regularly find the headrest and armrests run out of range, despite the big-and-tall marketing), you want a soft seat on day one (the mesh is taut and firm out of the box), or armrest padding matters to your elbows — the pads are thin and armrests are the part owners report failing first.
Check Price on Amazon →SIHOO M57 Ergonomic Office Chair review: full-mesh seat and split back, lumbar support that adjusts in height and depth, 3D armrests and an adjustable headrest. That adjustment list is the story: at this level most chairs give you a fixed lumbar curve or a foam seat, and the M57 gives you neither compromise — mesh everywhere, and a lumbar pad you can move up, down, in and out. Hands-on reviewers back the shape of it (Windows Central found it comfortable for long work and gaming sessions, with exceptional lumbar support and easy assembly), and owners on this listing — 7,800+ ratings averaging 4.3 stars (ExpertBeacon's data for this ASIN, updated March 2026) — report the mesh holding its shape over months rather than sagging. The honest limits are fit and finish, not features: despite the big-and-tall listing language, sitters around six feet and up regularly find the headrest and armrests run out of range, the mesh starts taut and firm with a break-in period, the lumbar can feel forward-pushy until it is dialled out, and armrests are the component owners report failing first — balanced by a support record that includes free replacement arms sent to a four-year owner outside the 3-year warranty. Judge it as the adjustable full-mesh chair for small-to-average frames, not the tall user's chair its title claims.
| Armrests | 3D adjustable (the listing's '3 way' armrests): height, fore-aft and angle; hands-on measurement found 4 height settings over about 7 cm, about 7 cm of fore-aft travel and about 36 degrees of rotation |
|---|---|
| Assembly | Required; Windows Central's hands-on assembly was easy, with an informative manual and the tool kit included in the box |
| Back | High-back full mesh with a split backrest design shaped to the spine's curve |
| Base | Reinforced aluminum five-star base with smooth-rolling, quiet casters |
| Headrest | Adjustable — about 3.15 inches of height travel and tilt to 45 degrees (the model's manual) |
| Lumbar Support | Adjustable in height and depth (the model's manual is explicit on both directions) |
| Max Weight | 330 lbs (Amazon product information for this Black ASIN and SIHOO's current spec page agree; the Grey variant's manual record says 300 lb — that is a different ASIN) |
| Model | SIHOO M57, Black — model name M57-M111, item model number M57-MUS, UPC 669614656623 (Amazon product information for this ASIN, B07BDFW1Y7). The Grey listing (B08XXNQT2Y) and the Light Grey listing (B0C5MNYLN5) are different ASINs with their own figures — do not substitute |
| Recline | 90 to 126 degrees with 3 lock positions and a tilt-tension knob (the model's manual) |
| Seat | Full mesh seat with a waterfall front edge; seat depth 18.11 inches (Amazon product information for this ASIN); no seat-depth adjustment |
| Seat Height | Adjustable — the model's manual gives 43.5 cm (about 17.1 inches) at the lowest setting, and hands-on reviewers measured about 10 cm (about 4 inches) of travel |
| Warranty | 3-year warranty with free replacement parts (the model's manual and the listing's feature copy agree), plus 30-day returns |
| Weight | 41.6 lbs (Amazon product information for this ASIN; Windows Central's spec table agrees) |
The adjustment list is complete in a way chairs at this level rarely are. The lumbar support moves in height and depth — both directions, where the GABRYLLY we review has no lumbar adjustment at all and the Duramont's moves a small amount — the headrest lifts about 3.15 inches and tilts to 45 degrees, the 3D armrests move in height, fore-aft and angle, and the recline locks at three positions between 90 and 126 degrees. Windows Central's hands-on review singled out exactly this: easy-to-use adjustable components and lumbar support they called exceptional.
It is mesh everywhere, and that is a real comfort route, not a cost cut. The seat as well as the back breathes, so there is no foam anywhere to hold heat against your thighs or your spine — reviewers who write six to eight hours a day in this chair credit the waterfall-edge seat with keeping their legs comfortable through long stretches, and Windows Central praised the same airflow in hot weather. Owners running the chair for months report the mesh holding its tension rather than sagging, which is the long-clock test a mesh seat has to pass.
The base and the certification are a tier up from the nylon norm. A reinforced aluminum five-star base, a 330 lb rating that SIHOO's own spec page confirms, and BIFMA and SGS certification with the key parts safety-tested — the structure under the mesh is the part of this chair nobody reviewing it complains about, and the casters are repeatedly described as smooth and quiet.
The support record, when something does go wrong, is documented and generous. The standout owner account on this listing is a four-year owner whose armrests failed one after the other: SIHOO does not normally sell individual parts, reviewed the case anyway, and sent replacement arms free — outside the 3-year warranty. That behaviour is part of what the 3-year warranty figure alone does not tell you, and it recurs in owner feedback about arrival damage being resolved rather than argued with.
The fit runs smaller than the marketing, and that is this chair's defining limit. The listing calls it big and tall, but reviewers who seat panels for a living report that sitters around six feet and up regularly find the headrest and armrests running out of range right where they need them, and conclude the chair fits small-to-average frames best. A 5 ft 10 in owner found the headrest could not go high enough and lacked locking notches at its higher positions. If you are tall, treat that as the headline fact about this chair, ahead of its feature list.
The mesh starts firm and the lumbar starts pushy. The mesh is taut out of the box and needs about a week of sitting before it settles — judge it after the break-in, not on day one, and do not buy it expecting a soft seat at any point. The lumbar and headrest geometry can also feel slightly forward-pushy at a desk until the depth adjustment is used to dial it out; the adjustment to fix it exists, but owners who never touch it sit with the complaint.
The armrests are the weak component twice over. Their pads are thin — Windows Central's one comfort criticism was armrests that feel hard on the elbows over a long session, and other reviewers note a slight wobble — and they are the part owners report failing: one owner had an armrest break after a few months, and the four-year account above lost both. SIHOO's support resolved those cases, but a part you may have to claim on is a part to know about before you buy.
Arrival quality control is imperfect. Cracked armrest shells, cosmetic dings and occasionally damaged boxes show up in the ownership feedback often enough that an unboxing inspection is worth the two minutes — photograph anything wrong before assembly, because the documented pattern is that SIHOO resolves reported damage and the unreported kind is yours.
Day to day, the M57 performs as an adjustment chair should: the support is where you put it. Set the lumbar's height and depth against your own spine and reviewers describe lower-back support that holds through full work sessions; leave it at the factory position and the same pad is the one owners call aggressive. That dial-it-in-or-live-with-it split is the honest summary of this chair's performance — it rewards the ten minutes of setup its rivals do not offer and punishes skipping them in a way a fixed-curve chair cannot.
Over a long clock, the mesh is the performer. Owners report it holding its shape and tension after months of daily use rather than hammocking, and the split backrest keeps contact along the spine as posture shifts between upright work and the reclined lock positions. The recline range itself — 90 to 126 degrees — is a work range, not a lounge range: enough to change posture through the day, not enough to nap in.
The failures that do accumulate are peripheral, and they are named above rather than repeated here: armrest assemblies and arrival condition, not the mesh, the base or the lift. A chair whose structure holds and whose bolt-on parts are the risk — with a maker documented sending those parts free — is a different ownership bet from a chair whose seat gives up, and it is the bet this one's 7,800+ owner ratings are actually reporting on.
Small-to-average-framed remote workers who run warm, sit long sessions, and want a chair that adjusts to them: a moving lumbar in two directions, a real headrest, 3D armrests and airflow through the seat as well as the back, on an aluminum base rated to 330 lb. It is especially relevant if a fixed lumbar curve has never landed in the right place on your back — this is the chair in our coverage whose lumbar travels furthest.
Skip it if you are around six feet or taller — the headrest and armrest ranges running out is the most consistent fit complaint in the feedback, and our GABRYLLY Ergonomic Office Chair review covers the chair built for taller sitters, with a 17.5 to 22 inch seat range and flip-up arms, at the cost of any lumbar adjustment at all. Skip it if you want a cushioned seat: the Duramont Ergonomic Office Chair pairs a foam seat with its own moving lumbar and the same 330 lb rating for larger frames. And skip it if you are buying for a shared desk and a decade of service — the HON Ignition 2.0 is the keeper with the seat-depth slide and lifetime warranty.
A chair is the foundation layer of a desk setup — the layer our ergonomic desk setup guide builds the screen, surface, feet and light layers on top of — so set its height against your desk before judging any other part of your setup.
This chair carries three fit facts, and they matter more than any feature on it: its adjustment ranges run out for tall sitters (around six feet and up is where the feedback turns), its mesh is firm with a break-in period of about a week, and its seat depth is fixed at 18.11 inches with no slider. Everything else about fit follows from those three, so check them against your own body and your own workday before anything else on this page matters.
Height is the first check, and it cuts against the listing's own language. The title says big and tall and the rating says 330 lb — both true on paper — but the headrest's roughly 3.15 inches of travel and the armrests' roughly 7 cm of height range are sized for small-to-average frames, and owners at 5 ft 10 in and above are the ones reporting both running out. The weight check, by contrast, is simple: judge against 330 lb, the figure Amazon's product information for this Black ASIN and SIHOO's current spec page agree on. (The Grey variant's manual record says 300 lb — a different ASIN, not a conflict in this one's figures.)
| Small-to-average frame, up to about 5 ft 10 in | Fits — the reason to buy | The headrest, armrest and lumbar ranges are sized for this frame; reviewers conclude the chair fits small-to-average frames best. |
| User around 6 ft or taller | Stretch to poor fit | Owners that height regularly find the headrest and armrests run out of range; the GABRYLLY we review is the tall sitter's chair. |
| Warm room, long sessions | Fits | Mesh seat and back both breathe; reviewers writing six to eight hours a day credit the airflow and the waterfall seat edge. |
| You want a soft seat on day one | Poor fit | The mesh is taut and firm out of the box and stays supportive-firm after its break-in week; there is no foam version of this chair. |
| User up to 330 lb | Fits, check the ceiling | Judge against the 330 lb figure published for this ASIN by both Amazon's product information and SIHOO's spec page. |
| User over 330 lb | Outside the rating | Above the stated maximum. The fix is a chair rated for the load, not this one at a stretch. |
Our chair coverage now holds four chairs, and each makes a different bet. The M57 bets on adjustment over mesh: a moving lumbar in two directions, 3D armrests and a headrest, sized for smaller frames. The GABRYLLY bets on mesh and simplicity for taller sitters, with no lumbar adjustment at all. The Duramont bets on a foam seat and a larger frame, with a lumbar that moves a small amount. The HON Ignition 2.0 bets on the shared desk and the long term — a seat-depth slide, a moving lumbar panel and a lifetime warranty, at the cost of any headrest on this configuration.
So the choice runs on two questions. First, the lumbar: if a fixed curve has never fit your back, the M57's height-and-depth travel is the strongest answer here, and the HON's wide height range is second; if a curve is fine, the GABRYLLY removes the question entirely. Second, the frame: taller points to the GABRYLLY, larger to the Duramont's foam seat at the same 330 lb rating, smaller-to-average to the M57, and shared or decade-long use to the HON. The owner pools behind all four (7,800+ ratings at 4.3 stars for the M57, 14,200+ at 4.4 for the GABRYLLY, 7,000+ at 4.1 for the Duramont and 1,700+ at 4.0 for the HON, all as of March 2026) say each shape has its buyers.
| Seat | Full mesh, fixed 18.11 in depth | Full mesh, 20 in wide | Foam cushion | Foam cushion with seat-depth slide |
| Lumbar support | Adjustable in height and depth | Fixed curved contour — no adjustment | Adjustable up/down/in/out, small range | Adjustable panel, wide height range |
| Armrests | 3D: height, fore-aft, angle | Flip-up, height only | Height; fore-aft only by loosening screws (about 1 in) | Height and width adjustable |
| Headrest | Adjustable height (about 3.15 in) and tilt (to 45°) | Adjustable 3D headrest, tall sitters only in practice | Integrated headrest, divided testers | None on this configuration |
| Weight rating | 330 lb | 280 lb (conservative; sources conflict to 300/400 lb) | 330 lb | 300 lb |
| Warranty | 3-year | 3-year (listing) | 5-year (listing) | HON Limited Lifetime Warranty |
| Owner pool | 7,800+ ratings, 4.3 stars (Mar 2026) | 14,200+ ratings, 4.4 stars (Mar 2026) | 7,000+ ratings, 4.1 stars (Mar 2026) | 1,700+ ratings, 4.0 stars (Mar 2026) |
Yes — in both height and depth, per the model's manual, which is more travel than any other chair we review: the Duramont's lumbar moves a small amount, the HON Ignition 2.0's panel moves over a wide height range, and the GABRYLLY's does not move at all. Owners also report the M57's lumbar can feel aggressive at its factory position, so use the depth adjustment to dial it out rather than judging the default.
330 lb for this Black ASIN (B07BDFW1Y7) — Amazon's product information for the ASIN and SIHOO's current spec page agree. The Grey variant's manual record states 300 lb, but that is a different ASIN (B08XXNQT2Y) with its own figures.
It is this chair's weak case, despite the big-and-tall listing language. Reviewers who seat test panels report sitters around six feet and up regularly finding the headrest and armrests out of range, and conclude it fits small-to-average frames best; a 5 ft 10 in owner found the headrest could not go high enough. The GABRYLLY Ergonomic Office Chair we review is the tall sitter's chair, with a measured 17.5 to 22 inch seat height.
After a break-in, owners and hands-on reviewers say yes — the mesh is taut and firm out of the box and needs about a week to settle, then holds its shape rather than sagging over months. Reviewers writing six to eight hours a day in it credit the waterfall-edge mesh seat and the airflow; it stays a supportive-firm sit, never a soft one.
They are its most adjustable and its weakest component at once: 3D movement (height, fore-aft, angle) with thin pads that hands-on reviewers found hard on the elbows over long sessions, a slight wobble in some reports, and the part owners most often report failing over years. The balancing fact is SIHOO's support record — replacement arms sent free even to a four-year owner outside the warranty.
Windows Central's hands-on assembly was easy, with an informative manual and the tool kit included. The warranty is 3 years with free replacement parts and 30-day returns. One arrival habit is worth it: inspect the chair before assembly — cracked armrest shells and cosmetic dings appear in owner feedback, and SIHOO's documented pattern is resolving reported damage.
The SIHOO M57 is the adjustment-first chair in our coverage: a full-mesh seat and split back, the longest-travelling lumbar support of the four chairs we review, 3D armrests, an adjustable headrest and a 330 lb rating on an aluminum base, backed by a 7,800+ owner pool at 4.3 stars and a support record that replaces parts even outside warranty. Its limits are equally specific: it fits small-to-average frames despite its big-and-tall title, the mesh needs a break-in week, and the armrests are its thin-padded, first-to-fail component. Buy it as the dial-in mesh chair for the frame it actually fits — and buy the GABRYLLY instead if you are tall, or the Duramont if you want foam under you.
