Ball diameter : Approximately 3.15'' FOR USE ON: handbag/bag/tote/satchel/inspired/hobo/bucket/clutch/ baby bag/backpack/cosmetic bag & case/laptop bag/mini bag/shoulder bag/travel bag/ wristlet/wallet/LV/Gucci/Louis Vuitton/Chanel/Fendi/Prada/Hermes/Valentino/MK/Michael Kors/Coach/Kate Spade/Juicy Couture/Miss Me/J Crew /Betsey Johnson/Tory Burch/Free People/Madewell/Victoria's Secret/VS/Zara/Lucky Brand/Forever 21/Anthropologie /Fossil/Lululemon/Nike/Adidas/Urban Outfitters/Phone Case etc.