Sidiz Stretches Its Flagship Chair to Fit Taller Workers, Lifting Size Coverage From 76% to 94%

Office workers above a certain height know the drill: the seat is too shallow, the backrest stops short of the shoulders, and the lumbar bump sits somewhere around the kidneys. Chair makers are now responding with modified dimensions rather than asking tall employees to make do.

South Korean manufacturer Sidiz has introduced revised versions of its chairs aimed at users from 180 centimetres tall, according to a report dated 22 October 2026. On these models the backrest grows 24 millimetres wider and roughly 30 millimetres taller, while the lumbar support moves further up. Seat width increases by 30 millimetres and seat depth by 15 millimetres; the gas-lift column gains 20 millimetres of adjustment range, and maximum armrest height rises by about 25 millimetres.

The cumulative effect is a jump in how much of the relevant height range the T60 line covers — from about 76 per cent to 94 per cent. As with the second generation of the T50, Sidiz is also rolling out a swappable seat-construction system combining mesh upholstery and padding.

What tall users actually need

A separate guide published the same day sets out the ergonomic priorities for this group. Seat height must be sufficient, seat depth adjustable, and the backrest long and anatomically shaped. A sturdy synchronous mechanism matters too, along with armrests that can be adjusted in height, width and depth, and a headrest that extends far enough upward.

Among the brands established in the German market the guide names Interstuhl, Topstar and HAG, though it offers no test data or model prices. Retail activity is drawing attention at the same time: Steelcase's Gesture model was being offered on Amazon at a discount of nearly 25 per cent, according to a report from the same day.

Klöber goes foam-free

Office furniture maker Klöber, meanwhile, has announced a new swivel chair called LOOC for workplaces with a high proportion of sitting. A report dated 21 October 2026 describes a foam-free seat construction that pairs a load-bearing mesh structure with spring-core and 3D fabric technology, doing away with polyurethane foam entirely.

The model is to be available with mesh fabric as well as textile or leather covers. Details on retail prices or a delivery start are missing, as are independent test verdicts from certification bodies.

Standards to check before buying

Beyond individual measurements, technical quality standards play a central role in any purchase. A procurement guide points to the need for a BIFMA-certified gas spring of at least class 3. It also warns against cheap materials: poor mesh upholstery frequently sags after one to two years, according to the guide, while inferior synthetic leather can crack after one to three years. For employees weighing 85 kilograms or more, a separate buying guide recommends class 4 gas springs and double-layered steel base plates.

Promotions are shaping the market in parallel. Sihoo is offering the IGR-certified Doro C300 Pro V2 for €429.99 instead of its recommended retail price of €469.99 during the run-up to Black Friday. Topstar's Ergo Net Basic is listed at Office World for 129 Swiss francs, reducible to 119 Swiss francs with a newsletter voucher. FlexiSpot has announced an autumn sale running until 26 October 2026, in which the C7 Max office chair, among others, drops from €459.99 to €329.99.