We recommend purchasing your “pre-pregnancy” size.  Although all brands vary, designers typically try to keep the sizing the same for both regular and maternity wear.

Typical Size Chart

XXS XS S M L XL

Pre-Pregnancy Size

0 2 4-6 8-10 12-14 16-18

Current Bust (inches)

Up to 34” 34-36 36-38 38-39 40-41 42-43

Current Hip (inches)

Up to 36” 36-38 38-40 40-42 42-44 44-46
 
By Designer: 7 for All Mankind
XS S M L
26-27 28-29 30-31 32
 
AG Jeans
S M L
28-29 30-31 32
 
Isabella Oliver
USA size 0 2 4 6-8 10 12-14 16
Isabella Oliver 0 1 2 3 4 5 6
 
Joe’s Jeans
S M L
28 29-30 31-32
 
True Religion
S M L
28-29 30-31 32
 
Japanese Weekend
TOPS    
Pre-pregnancy size Current Bust JW size
4 36” XS
6-8 38” S
10-12 40” M
14 42” L
16-18 44” XL
BOTTOMS    
Pre-pregnancy size Current Hip JW size
4 38” XS
6-8 40” S
10-12 42” M
14 44” L
16-18 46” XL
DRESSES    
Pre-pregnancy size Current Bust JW size
4 36” XS
6-8 38” S
10-12 40” M
14 42” L
16-18 44” XL