Nice to see people from around world here
This is what the (FCI) Samoyed standard says about the coat:
HAIR : Profuse, thick, flexible and dense polar coat. The Samoyed is a double coated dog with short, soft and dense undercoat and longer, more harsh and straight outer coat. The coat should form a ruff around the neck and shoulders framing the head, especially in males. On head and on front of legs, hair is short and smooth ; on outside of ears short, standing off and smooth. Inside the ears should be well furred. On back of the thighs the hair forms trousers. There should be a protective growth of hair between the toes. The tail should be profusely covered with hair. The coat of the female is often shorter and softer in texture than that of the male. The correct coat texture should always have a special glistening sheen.
COLOUR : Pure white, cream or white with biscuit. (The basic colour to be white with a few biscuit markings.) Should never give the impression of being pale brown.
We rarely see true biscuits and I think it's quite sad, they can be really pretty. About the length of coat, I think it shouldn't be too long but not too short either. Hard to explain but easier to see in pictures.