Size Guide
Bra Size Chart
Cup, Band
A
B
C
D
DD
DDD
G
32
XS
XS
XS
S
SDD
SDD
SDD
34
S
S
S
M
SDD
SDD
MDD
36
M
M
M
L
MDD
MDD
LDD
38
L
L
L
XL
LDD
LDD
LDD
40
XL
XL
XL
XLDD
XLDD
XLDD
42
XLDD
XLDD
XLDD
2XLDD
2XLDD
44
2XLDD
2XLDD
2XLDD
How to Measure
1. Find your band size
Align a measuring tape directly under your bust, keeping it parallel to the floor. The tape should feel snug but not tight around your body.
Use the chart, find your band size.
Band Size / Measurement
1. Find your cup size
Wrap the measuring tape at the fullest part of your bust, keeping it parallel to the floor. The tape should fit comfortably around your body.
Subtract your band size from your bust measurement. This bust-band difference determines your cup size.
* If your bust measurement is 36” and your band size is 32, the bust-band difference is 4”, indicating a D cup.
Cup Size / Bust-Band Difference
Fix Common Bra Fit Problems
Straps Slip
Tighten straps first. If they still fall, try a smaller band size.
Band Digs In
Try a larger band size. New bras should start on loosest hook.
Cups Overflow
Go up one cup size or try a style with more coverage.
Bustline Sags
Tighten straps or try a more supportive style like Pain-Free T-Shirt.
Band Rides Up
Loosen straps first. If still rides up, try a smaller band size.
Sides Buldge
Cup too small. Go up one cup size or try more coverage style.
Fix Common Bra Fit Problems
Straps Slip
Tighten straps first. If still slipping, try a smaller band size.
Bands Dig in
Try a larger band size. New bras should start on loosest hook.
Cups Overflow
Go up one cup size or try a style with more coverage.
Bra Rides Up in Back
Loosen straps first. If still rides up, try a smaller band size.
Sides Buldge
Cup too small. Go up one cup size or try more coverage style.
Bustline Sags
Tighten straps or try a more supportive style like Pain-Free T-Shirt.
Style Comparison
Each EBY style is designed for different needs and preferences. Use this comparison to find the features that matter most to you - whether you prioritize maximum support, all-day comfort, or versatile style options.
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Fit Note
Straps
Lift & Shape
Padding
Underwiring
Lucy Bra
True to Size
Adjustable
Natural shape
None
Wireless
Sheer Bralette
True to Size
Fixed
Natural shape
None
Wireless
Relief
Bra
True to Size
Adjustable
Gentle lift
Removable pads
Soft wire
Support Bralette
Runs Small
Adjustable
Wide for Plus Sizes
Natural lift
Removable pads
Wireless
Pain-Free T-Shirt Bra
Runs large
Adjustable
Maximum lift
Molded push-up
SmartSilicone
Wireless Bralette
True to Size
Fixed
Natural shape
Removable pads
Wireless
Panty Size
Size
XS
S
M
L
XL
1X
2X
3X
4X
Full Hip (in)
33-35
36-38
39-41
42-44
44-47
48-50
51-53
54-56
57-60
Waist (in)
23-25
25-28
28-30
31-34
34-36
37-39
39-41
41-43
43-45
Pants
00-2
2-4
6-8
10-12
14-16
16-18
18-20
22-24
26-28
Fit questions, answered.
Still have a question after this? Our fit experts are happy to help — seamlesssupport@join-eby.com
How does EBY sizing work?
EBY uses a simplified size system — XS through 2XLDD — in place of traditional band-and-cup sizing. Each EBY size maps to the standard sizes you already know. Use the chart above to find yours.
I'm between sizes. Should I size up or down?
It depends on the style. Most EBY bras run true to size. The Pain-Free T-Shirt Bra runs large, so size down. The Support Bralette runs small, so size up. The fit-by-style chart above notes this for each style.
How long does EBY microfiber take to break in?
EBY bras adapt to your body shape in 2-3 wears. They may feel snug initially but will conform to your unique shape for a custom fit.
Can I exchange if the size doesn't fit?
Yes. Contact our fit experts at 833-720-0070 or seamlesssupport@join-eby.com within 30 days. We'll help you find the right size.
What if my size isn't on the chart?
Our fit experts regularly help customers outside the standard range. Email seamlesssupport@join-eby.com or call/text 833-720-0070, Monday–Friday, 10am–5pm EST.
Shop with confidence.
Every EBY is backed by a 100% fit guarantee. If it isn't right within 30 days, we'll help you find the size that is — and exchanges are always free.
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