SIHOO is the budget mesh-chair brand that keeps popping up whenever anyone searches ergonomic chairs in the $200–500 band — and the satisfied-owner chorus is loud enough that we had to see for ourselves. This brand deep-dive, re-verified for 2026, covers the M18, M57, M90, and V1: which bodies each fits, where the plastic shows, and how they stack against the SIDIZ T50 and GABRYLLY. The M18 and M57 remain live on Amazon; links updated accordingly.
What’s up with these mesh chairs
SIHOO rose with the great mesh migration — everyone trading cushioned chairs for breathable ones — and reviews are one thing, but numbers don’t lie: the brand owns its price band. Still, we had to sit in them ourselves.
Looking at the build quality
The M18’s build is a mix of okay and flimsy: a durable metal foundation undermined by caster wheels whose roll announces “budget chair” immediately, and roughly 90 percent plastic parts — knobs and levers included. You can tell at a glance it won’t break your wallet, and the build tells you why.
SIHOO M57 Ergonomic Office Chair with 3 Way Armrests Lumbar Support and Adjustable Headrest High Back Tilt Function Black
Out of the SIHOO chairs, this is one of our favorites. This is ideal for those who stand 5'4” or 5'5 - 6'0”. And taller folks above 6 feet will not fit into the chair
- Full ergonomic kit at a budget price
- Holds up to 330 lbs
- Adjustable headrest and dual lumbar
- Mesh keeps its shape after break-in
- Tight fit for six-footers and up
- Needs a week of break-in
- Occasional arrival damage - inspect on delivery
The M57 shares the metal-foundation-plastic-wheels formula but goes all-mesh (a foam-seat option exists) with standard-grade mesh. The M90 resembles the M57 in materials and lever placement but cuts a sharper, edgier, slimmer silhouette. Across all three, the honest sizing note: these fit small-to-medium builds best. The rated capacities technically cover heavier users, but the mesh will sag under sustained heavy loading long before the frame complains. The exception is the V1 — more metal than plastic, heavier, more robust, and the SIHOO for bigger bodies.
Who fits which chair
SIHOO M18 Ergonomic Office Chair for Big and Tall People Adjustable Headrest with 2D Armrest Lumbar Support and PU Wheels Swivel Tilt Function Black
- 330-lb rating with a high back and headrest
- Adjustable lumbar — comfortable for a 6'2" tester (TechGearLab)
- Sold by SIHOO, usually under $150
- Casters roll poorly on carpet
- Adjustment knobs are stiff
- Armrests rigid with minimal adjustment
The M18’s seat-height range is narrow — 18 to 21 inches, comfortable for roughly 5’3″ to 5’10”. The M57 runs 18.5 to 21.5 inches, best for 5’4″ to 6’1″ (that half-inch matters at the short end — legs dangle). The M90’s higher range seats users past 6’1″, but its narrow 19-inch seat means bulkier builds won’t squeeze in comfortably.
Seat real estate: the M18’s 20 x 20-inch pan is adequate for most, with good thigh clearance — but its fabric runs rough, with a static-buildup habit that grates over time. The M57’s larger pan offers better comfort for wider sitters, the M90C stays the slim pick for thin-to-average builds, and the V1 adds a wider seat with 5 cm of seat-pan depth adjustment for the heavier crowd. For the two budget stars head-to-head, our SIHOO M18 vs M57 showdown settles it in detail.
And the comfort?
The M18’s mesh back is rough-ish but breathable, with genuinely nice support; the seat cushion arrives too firm and needs a break-in period. The M57’s mesh runs softer, and memory foam at the seat’s front edge pampers the thighs. The M90C’s back mesh is the stretchiest and most pliable of the family — the most comfortable back of the budget trio. And the V1’s mesh is the revelation: pliable like the M90’s but noticeably stronger, resisting sag and genuinely supporting heavier users.
More on the adjustability
The M18 covers headrest, height-adjustable arms, tilt with lock, and adjustable lumbar — adequate for most, though the tilt lock is its weakest mechanism, prone to sticking. The M57 adds lumbar tension adjustment and genuinely 3-way arms (up-down, side-to-side, front-back) — the personalized-comfort pick of the budget pair. The M90C counts eight adjustments, matching the M57 except for lumbar: its support is a flexible, self-adjusting panel that moves with you, Freedom-chair style — and honestly, we find it more comfortable than lever-adjusted lumbar. (Arm distance adjusts too, but by unscrewing — set once.)
Who will find these chairs the most comfortable?
Nearly everyone finds a fit somewhere in the family. Gamers and WFH folks get the most from the M90 and M57 — the tilt and recline offer a genuine mid-day respite, nap included. The basic M18 serves home workers and students happily. Tall users route to the M90; big-and-tall users to the V1 (our V1 vs M57 comparison weighs whether its premium is worth it).
How we see them versus other affordable chairs
SIHOO M18 — the bestseller: mesh back only, basic ergonomics, not the best quality but the most universally agreeable — see it on Amazon here. SIHOO M57 — the pro pick: all-mesh seat, back, and headrest with better arms, boxed above. SIHOO V1 — everything-adjustable comfort (4D arms, 2-way lumbar, seat depth) for the premium tier of the brand. SIDIZ T50 — the Korean-made rival with deeper ergonomic adjustment, mesh back with fabric seat; the standard T50 remains live (the all-mesh Air variant has cycled off), and our full T50 review covers it. SIHOO A7 — order-basis premium across US/UK/Canada. GABRYLLY — the promising SIHOO lookalike, still live here.
Against the IKEA MARKUS — the M57’s classic rival — the Swede is sublime if it fits you, but adjusts almost nothing; the M57’s adjustability makes it the safer buy for more bodies. The GABRYLLY counters with a wide 20-inch seat and 6’2″ reach, but skips a true tilt/recline — at similar money, the M57 or M18’s functional recline wins. And the M18 even undercuts and out-adjusts the Samofu. The value verdict holds across the board: M18 for average builds on the tightest budget, M57 for personalized comfort around the $250–300 mark, M90C for the taller and slimmer, V1 for the biggest bodies and the plushest mesh.
Last updated: August 30, 2026 — full 2026 refresh: M18 and M57 boxed and live, dead table links re-routed, T50 link updated.
