The calf contains a standard unfinished surface for interior and furniture applications. Calfskins sometimes exhibit surface veining and often lack a discernible grain, they are thin but tough and flexible, the average size is 5–7 square feet.
The natural calf color ranges from light to heavy natural patterning. Skins usually yield 15" across the spine by 20" down for 4-6 sf. skins, 20"x24" for 6-7 sf. skins, 24"x26" for 7-8 sf. skins, 24"x30" for 8-9 sf. skins, 26"x32" for 9-10 sf. skins, and 28"x34" for 10-11 sf. skins.