INTERNATIONAL STANDARDS FOR WOOL FELT | 1 | Indian | IS1719 |
| 2 | British | BS4060 |
| 3 | German | DIN-61200 |
| 4 | American | SAE-J-314 & CF-206 |
| 5 | Japanese | JIS-L-3210 |
| Density (g/cm3) | feel | Colour | IS 1719 * | BS4060 | Din 61200 | SAEF |
| 18-20 | Soft | White | Soft | A97/8W | M1 | F10 |
| Soft | Gray | Soft | A97/8G | | F11 |
| 23-25 | Medium | White | Medium | A97/6W | M4 | F5 |
| Medium | Grey | Medium | A97/6G | | F7 |
| 28-30 | Medium-Firm | White | Medium-Firm | A97/5W | M5 | |
| 33-36 | Firm | White | Firm | A97/4W | F1 | F1 |
| Firm | Grey | Firm | A97/4G | | F3 |
| 40-44 | Extra-Firm | White | Extra-Firm | A97/3W | F3 | |
| 55-65 | Hard | White | Hard | A97/1W | H3 | |
* As per IS1719 types of felts are divided in two main category i) General Purpose and ii) Precision Felts, thickness and physical properties varies type wise; for more details refer IS1719:2000 clause 6.1
