Hooks & eyes are used in sewing lingerie/underwear.

3x2 - width 28mm, length 54 mm
3x3 - width 54mm, length 66 mm

Perfect color match:
Picot edge knicker elastic https://wowlaceshop.etsy.com/listing/1889308342
Fold-over elastic https://wowlaceshop.etsy.com/listing/1903507397
Picot plush elastic band https://wowlaceshop.etsy.com/listing/1903499903
Edge picot plush elastic https://wowlaceshop.etsy.com/listing/1832582515
Laminated foam dusty pink https://wowlaceshop.etsy.com/listing/1825207837

The real color of the lace may be shown as slightly different depending on your monitor settings.