The Xoloitzcuintle is an ancient natural primitive dog, modelled by evolution, going by the general conformation, it is a very attractive slim and elegant dog, moderate in all aspects, that express speed, harmony and strength without appearing coarse, possess a clean cut outline, it has a well-proportioned body, chest is ample, ribs well sprung, limbs and tail are long. There are two varieties in the breed, hairless and coated, both identical in conformation except for coat and dentition.
Hairless variety: The most important characteristic is the complete or almost complete lack of any hair in the body, with a smooth and soft skin. The particular feature is that the dentition is nearly always incomplete, associated to the congenital hairless gene.
Coated variety: A very attractive, completely short coated dog. Coat should be tight, flat and smooth with no undercoat. The coated variety should have the same harmonious proportions as the hairless variety in conformation, the dentition must be complete (42 teeth) normally developed and in a normal position.
IMPORTANT PROPORTIONS: The body, measured from the point of shoulder to the point of buttock and from the highest point of the withers to the ground, is slightly longer than high: approximately 10:9. Females may be slightly longer than males due to their reproductive function. The skull and the muzzle are approximately of equal length.
There are three sizes in the breed, all lean and sturdy, well-muscled, with a spacious ribcage and moderate bone, the outline is rectangular and the distance from the elbow to the ground is equal to or slightly greater than the distance from the withers to the elbow.