Figure 1

1. Minimum distance from edge of keypad : 1.0mm.
2. typical membrane dimension : key size+2.5mm.
3. typical guide hold spacing : 30-50 mm.
4. Minimum radius dimension : 2.0 mm.
5. typical corner radius dimension : => 1.0 mm.
6. Minimum key pitch dimension : =>4.0 mm.
7. Minimnm guide hole dimension : =>1.5 mm.
8. Minimum distance from hole to membrane of switch : 1.0 mm.
9. Minimum membrane spacing dimension  : 1.0 mm.

Figure 2

1. Minimum clearance between bezel and keys : 0.3mm.
2. Minimum key pitch dimension : 4.0mm.
3. Typical pill size dimension(circular pills) : 2.0-8.0mm.
4. Typical pill thickness dimension : 0.4-0.5mm.
5. Typical chamfer dimension : 0.5mm.
6. Typical chamfer angle dimension : 45°.
7. Typical air channel dimension : 1.5~2.0mm.
8. Typical base thickness dimension : 1.0mm.