Wholesale 20 PCS 18MM Retro Vintage Round Crystal Ivory Faux Pearl Rhinestone Buttons Sew Bulk (Shank)

Would these hold up ehen washed?

Can these 'sparkly beads' be used just partially on a neckline for a Christmas party decoration ? They're just too pretty to not be able to be used.

What are they referring to as feet.

Will these hold up to washing if placed on a garment?