I bought these Chantelle beauties because they were so gorgeous and matched the bra but I don't like thongs and never wore them. Tricked myself again! workmanship is just beautiful with the intricate navy & turquoise embroidery & perfectly gathered sides. About hygiene - I never wore these but just in case they were tried on in-store, I always wash panties in lingerie soap, add a little bleach & swish a few seconds before rinsing. I have all 5⭐️ ratings on all my lingerie sales, including panties & bodysuits. Size tag is missing. I’m size 6 in pants and skirts so I based the size on that.