Review on 925 Sterling Silver Replacement Screw Backs for In Season Jewelry Earrings - Set of 2 by Stephen Tharpe

I bought these for my little one along with a 5mm 925 sterling silver heart. We bought replacement backs because even though they are screwed on things happen and they can fall off and get lost. I bought them on June 8th this year and we made it up to 2 days ago with the original backs (we lost one). I went to do an extra spin and you know what? That does not fit. It just slides back and forth, too big. I didn't see anywhere in the product description that I bought the wrong size. Or that there are different back sizes to choose from. I understand that anything can happen and this may not be standard company practice. Of course I don't have a 30 day guarantee but I didn't think to try them on to see if the replacement pieces would fit the stud when I received them. Wasted $9.99, a disappointment to say the least.