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Listing is for one pair of Round Underwires.
You can check for your size in the sizing chart below.
The Round Underwire is a standard wire that is used for a number of bra patterns. Compared to the Regular Classic Day Wire, it is 10mm longer at the center front and has a rounder shape at the underarm area with less splay.
Please note that if your had purchased these wires before 11/18/2021, they were referred to as the Long Classic Day Wires.
You can use the Round Underwire with the following bra patterns:
• Pin Up Girls Classic Bra Pattern
• Pin Up Girls Shelley Bra Pattern
• Ohhh Lulu Sews Cindy Bra
• Contour Atelier Chelsea Bra
Made from premium 22 gauge wire.
There is no size standardization across underwire suppliers. The pattern maker can draft their bra pattern based on a particular wire supplier and there can be variances in the lengths of the round underwires offered across different suppliers. Before making any pattern, I would suggest always walking the underwire around the wire line to make sure there's enough wire play before cutting into your fabrics.
Round Underwire Size Chart:
30: 183mm Fits 32A - 30B - 28C - 26D
32: 198 mm Fits 34A - 32B - 30C - 28D - 26DD/E
34: 213 mm Fits 36A - 34B - 32C - 30D - 28DD/E - 26DDD/F
36: 228 mm Fits 38A - 36B - 34C - 32D - 30DD/E - 28DDD/F - 26FF/G
38: 243 mm Fits 40A - 38B - 36C - 34D - 32DD/E - 30DDD/F - 28G/FF -26H
40: 258 mm Fits 42A - 40B - 38C - 36D - 34DD/E - 32DDD/F - 30G/FF - 28H - 26I
42: 273 mm Fits 44A - 42B - 40C - 38D - 36DD/E - 34DDD/F - 32G/FF - 30H - 28I
44: 288 mm Fits 46A - 44B - 42C - 40D - 38DD/E - 36DDD/F - 34G/FF - 32H - 30I
46: 303 mm Fits 48A - 46B - 44C - 42D - 40DD/E - 38DDD/F - 36G/FF - 34H - 32I
48: 318 mm Fits 50A - 48B - 46C - 44D - 42DD/E - 40DDD/F - 38G/FF - 36H - 34I
50: 333 mm Fits 52A - 50B - 48C - 46D - 44DD/E - 42DDD/F - 40G/FF - 38H - 36I
52: 348 mm Fits 54A - 52B - 50C - 48D - 46DD/E - 44DDD/F - 42G/FF - 40H - 38I
54: 363 mm Fits 56A - 54B - 52C - 50D - 48DD/E - 46DDD/F - 44G/FF - 42H - 40I
You can download the Round Wire Chart here.