| HALTI | Sizes indicated are for typical adult dogs - bitches or juveniles may need a size smaller. It is important to have the correct fitting for every dog - see instructions inside the packaging. |
| BASKERVILLE | Height must allow mouth to open in panting: length must leave 1 cm clear from end of nose. |
| KONG | Larger sizes and more than one type are recommended for variety. |
| BOOMER | Larger sizes are also suitable. 22" for zoo animals and exceptionally large dogs. |