We don’t recommend using a spacer on a leather bracelet. Here is a list of clasps that are not suitable to use with leather bracelets: Basic Clasp, Swan Clasp, Dragon Clasp, Heaven Crane Clasp, Big Fish Clasp, Big Flower Clasp, Beloved Cat Clasp, My Love Clasp, Dolphins Fun Clasp. The clasps that are underlined and with bold letters above, we know for sure that they don’t fit the leather bracelets. While it may be possible to fit the others on a leather bracelet due to the malleable nature of leather, we advise against forcing the clasps through the leather. When measuring for a leather bracelet we recommend a snug fit as the leather will stretch over time. Some beads have a larger hole and will therefore be looser on the leather bracelet than other beads.