SIHOO M109 Office Chair, Adjustable Lumbar, Black

Black: The SIHOO M109 office chair (model M109C-UK) combines height-adjustable lumbar support with flip-up, height-adjustable armrests and a mesh back. Its tilt and seat-height controls share a single lever, while the listed dimensions and seat measurements are worth comparing with your desk and preferred fit.

At a glance

Lumbar support is described as height-adjustable over 5.5 cm.
Armrests adjust in height and can be flipped up to help the chair slide under a desk.
The listed construction pairs a cut-foam seat with a mesh back.
A single lever is claimed to control seat height and tilt lock, with adjustable tension and recline up to 128°.

Price

£99.99Save 23%

Reference price: ~~£129.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Flip-up armrests offer a practical way to reduce the chair's footprint when it is pushed under a desk.
The 5.5 cm adjustable lumbar support and 9 cm adjustable armrests allow some positional adjustment.
Mesh back and foam seat give buyers two different seat and back materials.

Technical specifications

25 specifications

Identity
Brand	SIHOO
Model	M109C-UK
Form factor	Desk Chair

Dimensions and fit
Dimensions listed	67.5 x 68 x 101 centimetres
Weight listed	14.6 Kilograms
Seat height	55.3 Centimetres
Seat depth	47.8 centimetres
Seat length	51 Centimeters
Backrest interior height	56.5 Centimetres
Backrest width	51 Centimetres

Materials and care
Material listed	Polypropylene
Frame material	Nylon
Seat material	Foam
Fabric	Mesh
Care instructions	Wipe Clean

Adjustments and use
Lumbar support adjustment	5.5 cm
Armrest height adjustment	9 cm
Recline range	113°-128°
Height-adjustable lumbar support	Adjustable Height
Arm style	Flip Up
Base movement	Swivel
Tilting	Yes
Height positions listed	3
Indoor or outdoor use	Indoor
Surface recommendation	Hard Floor

What to know before buying

Listing details to confirm

The listing mixes a title claim of an adjustable lumbar chair with differing detail fields and measurement formats. It lists the item dimensions as both 67.5 x 68 x 101 centimetres and 67.5D x 68W x 101H centimetres, and the seat-height figure may merit checking for fit. Its title and feature text say adjustable-height armrests, while a separate detail field says three height positions. The feature copy also claims a 128° maximum recline while describing 113°-128°. Confirm the configuration and measurements on the selected listing before purchase. The feature copy claims a Class 3 gas lift compliant with BIFMA standards, a 3-year warranty and free returns and exchanges within 30 days. These terms are not otherwise detailed here.

What’s in the box

Included

Arm pad

Who is it for?

A good fit for

People who want a desk chair with adjustable lumbar support and height-adjustable, flip-up armrests.
Home-office or study users looking for a mesh-back chair with a foam seat and tilt adjustment.
Buyers with space to compare the listed 67.5 x 68 x 101 centimetre footprint against their desk area.

Less suited to

Shoppers who need confirmed seat-height settings or fully consistent dimensional information before choosing a chair.
Anyone seeking an explicitly documented warranty or return policy, as the listing provides only brief feature-copy claims.

SIHOO M109 Office Chair, Adjustable Lumbar, Black · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 254 ratings

5 stars79%79%
4 stars21%21%
3 stars0%0%
2 stars0%0%
1 star0%0%

Aggregate ratings are strongly positive, with the supplied distribution concentrated in four- and five-star categories. That is a favourable overall signal, but no written customer feedback is available here, so it cannot establish specific strengths, concerns or fit experiences. For buyers, the chair's adjustable lumbar support and flip-up arms are listing claims rather than customer-reported outcomes.

Frequently asked questions

Do the armrests flip up?

Yes. The listing describes height-adjustable armrests that flip up, which can help the chair slide under a desk.

How far does the chair recline?

The feature copy gives a 113°-128° range and says it reclines up to 128°. Check the selected listing if a particular recline angle matters.

What are the listed chair dimensions?

The technical details list 67.5 x 68 x 101 centimetres. Another listing field gives 67.5D x 68W x 101H centimetres, so verify the orientation and fit before ordering.

Does it require assembly?

Yes. The listing marks assembly as required. Its feature copy describes assembly as easy for one person, but does not provide a time estimate.