It seats height is easily adjustable.
It is a seat height that ranges from about 16 to 21 inches off the floor should work for most people. This allows the user to have his or her feet flat on the floor, with thighs horizontal and arms even with the height of the desk.
The seat are enough width and depth to support any user comfortably.
The depth (from front to back of the seat) needs to be enough so that the user can sit with his or her back against the backrest of the office chair while leaving approximately 2 to 4 inches between the back of the knees and the seat of the chair.
The lumbar spine has an inward curve, and sitting for long periods without support for this curve tends to lead to slouching (which flattens the natural curve) and strains the structures in the lower spine.
Backrest able to support the natural curve of the spine, again with special attention paid to proper support of the lumbar region.

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