The coat is generally lighter in colour than in the American types. Males stand between 22 to 24 in (56 to 61 cm) at the withers; females are between 20 to 22 in (51 to 56 cm). Acceptable or expected weights are not specified in the UK standard, but the Kennel Club standard calls for a level topline and straight hindquarters without the slight rear angulation found in American lines.The eyes are round and dark, which is in contrast to the triangular or slanted composition of their American counterparts. The Golden's coat can also be mahogany, referred to as 'redhead', although this is not accepted in the British show ring. As a Golden grows older, its coat can become darker or lighter, along with a noticeable whitening of the fur on and around the muzzle. Puppy coats are usually much lighter than their adult coats, but a puppy with darker ear tips may indicate a darker adult colour.