Sizing Guide | Eco Intimates

For both Bras and underwear, I suggest to go with the sizing you usually wear in your favourite brands, for example if you are usually a size 10 (S), but like to size up to a M for comfort, then choose size M (12). I have aimed to keep my sizing as close to many Australian underwear brands as possible — If you are confused at all - I’m happy to help, just message me here.

1) Band Size Guide

Eco Band	AU	US/UK	EU	Suggested Underbust (cm)
XS	8	30	65	≤ 70
S	10	32	70	70–75
M	12	34	75	75–80
L	14	36	80	80–85
XL	16	38	85	85–92
2XL	18	40	90	92–100

2) Cup Size Guide

I have created my cup sizes increments to 2.5cm for each cup size. Just measure the fullest part of your bust and subtract your under-bust to find the cup size.

Bust − Under-Bust Difference (cm)	Cup Size
2.5	A
5	B
7.5	C
10	D
12.5	DD
15	E
17.5	F
20	G

Tip: If you're between sizes, we recommend rounding up for a more comfortable fit — especially with soft fabrics.

Notes on Bra Styles

Many of my styles are designs for a range of cup sizes, such as A-C, D-DD and F-G, which I call petitie, full cup and extra full cup. Pick your cup category, then match your band from the underbust guide.

Petite Cup: A–C
Full Cup: D–E
Extra Full Cup: F–G

3) Underwear Sizing

ECO INTIMATES SIZE	XS	S	M	L	XL	2XL
Low Hip (cm)	88-92	93-97	98-102	103-107	108-113	113-117
= AU/UK	8	10	12	14	16	18
= US (Underwear)	0-2	4-6	8-10	12-14	16-18	20
= US (Dress)	4	6	8	10	12	14
= EURO	36	38	40	42	44	46
= JP	7	9	11	13	15	17