1. UNDER-BUST

Your UNDER-BUST is where the band of your bra fits around your ribcage.

This is the number part of a bra size, 8, 10, 12, 14, 16, 18 (= band size)

2. OVER-BUST

Your OVER-BUST measurement is the fullness of your breasts.

This is the LETTER part of a bra size, A, B, C, D, E, F, G (= cup size) 

Calculate Your Bra Size

Finding your ECO INTIMATES Bra size is super simple! We design our bras around CUP sizes, so once you know your cup size, you only need your under-bust measurement to choose your size.

Step 1 – Measure Your Under-Bust

Use a soft measuring tape to take a snug measurement directly under your bust. This will determine your band size. Our sizing is based off your actual measurement – no need to add extra centimetres like older methods.

Step 2 – Measure Your Over-Bust

Measure around the fullest part of your bust while wearing a bra. For most people, this is at nipple level, but check a few points to find where your bust is fullest.

Once you have both measurements, use the chart below to find your size. If your measurement falls between sizes, we recommend rounding up for the best comfort and coverage.

Eco Intimates Band Size Guide

Our bra bands are designed with approximately 15% stretch to provide a soft, flexible fit without compromising support. Use the chart below to find the ideal under-bust measurement range for each band size.

Size Label Flat Band Length (cm) Max Stretch (15%) Recommended Under-Bust Range
XS 58 66.7 63–66 cm
S 63 72.5 68–72 cm
12 / M 68 78.2 73–77 cm
14 / L 73 83.9 78–82 cm
16 / XL 78 89.7 83–87 cm
18 / 2XL 83 95.4 88–92 cm

Eco Intimates Bra Sizing Chart

Your Under-Bust (cm) Band Length (cm) AU Size Cup A Cup B Cup C Cup D Cup DD (E) Cup F Cup G
65–70 58 8 / XS 70–72 73–75 76–78 79–81 82–84 85–87 88–90
71–76 63 10 / S 76–78 79–81 82–84 85–87 88–90 91–93 94–96
77–82 68 12 / M 82–84 85–87 88–90 91–93 94–96 97–99 100–102
83–88 73 14 / L 88–90 91–93 94–96 97–99 100–102 103–105 106–108
90–95 78 16 / XL 94–96 97–99 100–102 103–105 106–108 109–111 112–114
96–102 83 18 / 2XL 100–102 103–105 106–108 109–111 112–114 115–117 118–120

Still unsure? Feel free to contact us for personalised sizing help — we’re here to support you.

Contact Madonna

I am so happy to assist with this process so message me in the chat or here with you UNDER-BUST and OVER-BUST and I will let you know your best size. 

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