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The Runderwear G-String fits a little on the small side. If you are considering two sizes then choose the larger one.
We hope you enjoy the tutorial series we've put together to help you select your best bras online. Please get in touch via the chat function on our website with any questions, we're here to help.
Most women wear the wrong size, even bra fitters are sometimes limited with what sizes they can supply to you and may have made mistakes with your past bra fittings.
Like any other garment, the sizing on the tag is a guide. Bra brands can use different scales or sizing systems.
The band the runs around the ribcage is responsible for delivering most of the support. This needs to be firm, but not uncomfortably tight.
The shoulder straps are there to help stabilise the breast, they should not take the weight of the breast. Relying on these for support will result in discomfort and the potential for long term damage.
Lots of women think underwire is the most supportive option. In reality the role of underwire is to shape and separate the breast. It is not there to stop the breast from bouncing during activity. High-quality well-fitted non-underwire Sports Bras can offer the highest impact support, even for the G cup+ sizes.
Step 1: Taking The Measurements
Two measurements need to be taken. The ribcage circumference (measurement A) and the bust circumference (measurement B). Both measurements need to be recorded in inches. The measuring tape should sit firmly, but not tightly against the skin. You should be breathing out when taking the measurements.
Step 2: Determining The Band Size
Measurement A will determine the band size.
28” = size 6 38" = size 16
30” = size 8 40" = size 18
32” = size 10 42" = size 20
34” = size 12 44" = size 22
36” = size 14 46" = size 24
Step 3: Determining The Cup Size
Determine the cup size by doing a simple calculation to measure the difference between the ribcage size and the bust size. Measurement B (in inches) – Measurement A (in inches).
Eg Measurement B = 40", Measurement A = 36” = difference of 4” = D cup
Eg Measurement B = 50”, Measurement A = 42” = difference of 8” = FF or G cup
Difference of 1 = A cup Difference of 7 = F cup
Difference of 2 = B cup Difference of 8 = FF/G cup
Difference of 3 = C cup Difference of 9 = G/GG cup
Difference of 4 = D cup Difference of 10 = GG/H cup
Difference of 5 = DD cup Difference of 11 = H/HH cup
Difference of 6 = E cup Difference of 12 = HH/J cup
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Type: Sports Brief
The Running G-String that keeps your comfortable, chafe-free and with no VPL in sight.
Comfy under tights for running