# 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.

- [Original product page](https://bargainpostbox.co.uk/product/sihoo-m109-office-chair-adjustable-lumbar-black)
- [View offer](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: SIHOO
- Model: M109C-UK
- Category: Home & Kitchen > Furniture > Chairs & Armchairs
- Price: 99.99 GBP
- Previous price: 129.99 GBP
- Discount: 23%
- Price checked: 2026-11-12T18:14:20.382Z
- Rating: 4.8 / 5
- Reviews: 254

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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°.

## 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.

## 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

## Before you buy

- 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.

## In the box

- Arm pad (Included)

## 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.

## Customer feedback

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.

## Alternative options

- [SIHOO B100 SE Ergonomic Office Chair, Desk Chair with Lumbar Support 300lbs \| Soft Memory Foam, Flip-up Armrests, Comfy Computer Chair for Home Office, 3-Gear 110°-135° tilt - Black](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [SIHOO M18 Ergonomic Office Chair, Adjustable Lumbar Support, 330 lb, Black \| Adjustable Headrest, Breathable High-Back Mesh, Wide Cushion, 2D Armrests, Tilt Lock, All-Day Sitting Comfort for Home Office](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [SIHOO Ergonomic Office Desk Chair with Flip-Up Arms & Breathable Mesh Back \| 2D flip-up armrests, 3D headrest, adjustable lumbar, breathable mesh, 120-130° recline, BIFMA tested, home office, study](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [Keratee Ergonomic Office Chair with Adjustable Lumbar Support and Headrest, 136 KG Swivel Desk Chair with Flip-Up Arms, Mesh Comfy Padded Seat for Computer and Home, Black](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [SIHOO Doro C300 Ergonomic Office Chair, Dynamic Lumbar Support, Black \| Ultra-Soft 3D Armrests, Reclining and Height-Adjustable Backrest, Swivel Chair, Large Seat, Suitable for Remote Work](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [SIHOO B100 Full-Mesh Office Chair, Adaptive Lumbar Support, 300 lb, Black \| Adjustable Wide Headrest, Flip-Up Armrests, Breathable Full-Mesh Back, 3-Gear Tilt Lock, Comfort That Moves With You](https://bargainpostbox.co.uk/visit/sihoo-b100-gmuk-full-mesh-office-chair)
- [SIHOO B300 Pro Ergonomic Office Chair, Adaptive Lumbar Support, Soft Black \| 6D Flip-Up Rotatable Armrests, 3D Wide Headrest, Breathable Mesh, 135° Recline, High Back](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [Ticova Ergonomic Office Chair - High Back Desk Chair with Adjustable Lumbar Support, Headrest & 3D Armrest - 130°Rocking Mesh Computer Chair](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [Ergonomic Office Chair, High Back Mesh Desk Chairs with Adjustable Flip-Up Arms, 3D Headrest, Tilt Back, Comfy Heavy Duty Computer Gaming Executive Chairs for Home Office Long Hours \(Luxury Black\)](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [FLEXISPOT Desk Office Chair, Big and Tall PU Leather Ergonomic Office Chair, 600 lbs Adjustable High Back Computer Chair with Adjustable Lumbar Support, 2D Armrests, Blade Casters（ Black）](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [Desktronic Adjustable Ergonomic Office Chair \| Desk Chair with headrest, armrests, lumbar support, height adjustments - Designed for European body - Breathable Mesh - Spacious seating \(Black\)](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)
- [Durrafy Ergonomic Office Chair, 4D Lumbar Support Mesh Desk Chair with 90° Folding Armrests, 150kg Load Height Adjustable Computer Chair for Home Office](https://bargainpostbox.co.uk/visit/sihoo-m109-office-chair-adjustable-lumbar-black)

## Images

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 1](https://bargainpostbox.co.uk/i/OHbTK3MuSOrnaCZe3JfY7sH4ZLqGO3EYHIIqv2iLIVQYgnd7g9hzsBpZ_EVgXBZmfEvHaU4BFlvFnTCD7AUP2_acXuRmtT6wxGcZgeualMQYBuO5-OSkt0EG.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 2](https://bargainpostbox.co.uk/i/X6hX3XSJsQKGrZVY-McBjcaIrUESu0QDj-XuC2vgeRf6FyJA6HZWB309WDuOY3SS-aimiAD7v627FVhtvWzOfDBAAQK7jjQX8mhY077--tIGs2knM6vNM6aY.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 3](https://bargainpostbox.co.uk/i/S-MdQfReJaW4ZEE9K8N2PR_84GnXNl89cMRP9F5gTBBnOL-CAwn_25_2AuNh4gROX8pKBuG2r1vxBYEDelvr-dlNNO2saLt7XtyWh6xpkmf-X2jjmp6g4ebL.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 4](https://bargainpostbox.co.uk/i/A6je4jlTCsQ6VHrcG6d8jvtOy_6hoYodPEj331hFnOglbVj-ncGNB1_PQLFrxu7lRrtzqDsTTp8vvGkZ6OC3-I6zVEHxfufc9XikVfNuBnl6CD6q_3nKhGIG.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 5](https://bargainpostbox.co.uk/i/11yhH-e-p_bIiGEvCrOHVktFlrUtbJTS3MFzFRHyzpg06FJ2CMTmODNbhT7bcBb-dJJaODr_nW5jUIVX3CqsPC5mFq2bFug9oXJCScVdbUdzMU38Wykb5o_J.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 6](https://bargainpostbox.co.uk/i/Xtks6P3RjtacFMeTVp1baM16eOcieoOzCeQ7V6Y95-G-7Ezuf3QF0EMLZ1zei-yLmktEDaj3XjFkgFuN0UodAkLsB5zDUGyuPKIbi0xF9QambYzykxnErt-l.jpg)

![SIHOO M109 Office Chair, Adjustable Lumbar, Black — 7](https://bargainpostbox.co.uk/i/VNrCSzBb2alyxIIz_CeXshAaw9wKR8QBFXZ3VqefeSrLS6P9K47NyHF0Pm8Ns_ZAz5qvzmAxhlM4qaQL8CyEvSzvyoPm3oQzm0xHnnMMgH63D1zb7TBKZzJZ.jpg)