BIRCH-A | BIRCH-A-KT | BIRCH-B | |
| Height | 1170-1255 mm | 1170-1255 mm | 1025-1110 mm |
| Seat depth | 570-630 mm | 570-630 mm | 570-630 mm |
| Seat width | 660 mm | 660 mm | 660 mm |
| Distance from floor to seat | 480-565 mm | 480-565 mm | 480-565 mm |
| Backrest width | 465 mm | 465 mm | 465 mm |
| Distance from seat to the top of backrest | 820 mm | 820 mm | 820 mm |
| Width between armrest | 465 mm | 465 mm | 465 mm |
| Distance from floor to armrest | 655-735 mm | 655-735 mm | 655-735 mm |
| From seat to armrest | 175 mm | 175 mm | 175 mm |
| Tilt angle degree | 130° | 130° | 130° |
