Size identification (A / B / C)
Flip the chair over and count the size-adjustment buttons on the rear mechanism housing: 1 button = Size A (small, roughly 5'0"–5'6"), 2 buttons = Size B (medium, roughly 5'4"–6'0"), 3 buttons = Size C (large, roughly 5'10"–6'6"). When ordering in bulk, specify the size mix you need and we will match from live inventory.






