Bra Strap Elastic - Black – Sewing Supply Depot

82% Nylon 18% Spandex Elastic  - Shiny satin center  - Suitable for garments such as lingerie, bras and more. 

90% Nylon , 10% Spandex, Available by the Yard, or Roll

Scalloped Strap Elastic - Black

1/2 PLUSH BACK BRA STRAP ELASTIC - by the metre - – The Makehouse Co-op

Picot elastic suitable for lingerie, etc.

3/8 Picot Elastic - Black

bra-strap-holders

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Braided Elastic is a lightweight elastic that narrows when stretched. Known for it's strength and longevity even in the narrowest widths. Great for

Braided Elastic (by the yard)

Satin Stripe Strap Elastic Bra Strap Elastic - Bra-Makers Supply

Where can I find affordable supplies for lingerie making? : r/sewing

Buttonhole Elastic at l'oiseau fabrics online fabric store