The tail is docked or can be left natural. Both rams and ewes are horned. The males horns are much larger, two or four horned being preferred, but odd numbers or fused horns are seen. Their eyes are dark, marbled or even light blue. Most of these sheep range in weight from 50 to 90 pounds, but much smaller ones can be found.
Females are often smaller than the males in general, and as with most miniatures, smaller is better.
The Miniature Jacob's wool has a soft, medium to fine grade fleece of two colors. The white color is clean and bright. Staple length approximately four to seven inches. Being a non-improved breed, Jacob Sheep have not developed the problems of some of today's more popular meat and larger wool breeds. They're still close link to the primitive sheep brings ease of lambing, and twins are common.