UNICRAFTALE 100pcs Stainless Steel Stud Earrings, 0.8mm Pin Ball Ear Studs Components with Open Loop, Ball Stud Earring with Earring Backs Jewelry Findings for Women Earring Making Ball Post Earring : Amazon.co.uk:
Outus 200 Pairs (400 Pieces) Stainless Steel Earrings Posts Flat Pad with Butterfly Earring Backs for Earring Making Findings (Silver) : Amazon.co.uk: Home & Kitchen
PandaHall 40pcs Ball Earring Studs for Jewellery Making, 304 Stainless Steel Earring Posts Earring Hook Loop with Earring Backs for Earring Making Charms, Golden and Silver Tone : Amazon.co.uk: Fashion
925 Sterling Silver Butterfly Backs Backing for Ear Stud - Etsy UK