sapphire top size chart

(in inches)
bust      
straps
length-center front
extra small
 28-30
 up to 20.5
 7.5
small
 31-33
 up to 20.5
 7.5
medium
 32-35
 up to 20.5
 7.75
large
 34-36
 up to 20.5
 8
extra large
 35-37
 up to 20.5
 8