Lycra-stretch back.

Measurements 

Ladies 4-  Bust: 30 Waist: 28 Length: 21.5

Ladies 6-  Bust: 33 Waist: 30 Length: 22

Ladies 8-  Bust: 35 Waist: 31 Length: 22.5

Ladies 10-  Bust: 36 Waist: 32 Length: 23

Ladies 12-  Bust: 37 Waist: 34 Length: 23.5

Ladies 14-  Bust: 39 Waist: 35 Length: 24

Ladies 16-  Bust: 41 Waist: 37 Length: 24.5

Sizes may vary slightly