Full slip sizing is equivalent to dress size and bust measurement:

Dress Size	Bust Measurement	Slip Size
8	30	30
10	32	32
12-14	34	34
16	36	36
18	38	38
20	40	40

To choose the correct size half slip, check your hip measurement:

Hip Measurement	Size
32-35	Petite (P)
35-38	Small (S)
38-41	Medium (M)
41-44	Large (L)

1) Find your band size: take a tape measure and measure around your chest just under your arms. Remember to stand up straight. If it's an odd number, like 33, go to the next higher even number, in this case band size 34.

2) Find your cup size: measure around the fullest point of your bust across your nipples. Do this with your bra on. If this number is 1 inch more than your band size, your cup size is an A. Two inches more than your band size, you're a B, etc. See the table below.

Bra Sizing

Difference	Cup Size
0	AA
1	A
2	B
3	C
4	D
5	DD
6	DDD
7	F
8	FF
9	G
10	H
11	I