I like the idea of glue but make sure it becomes invisible when dry and does not wash out. Just looked at my sleeping dog's collar and it has been finished with a larger stitch in a matching polyester thread. The collar she is wearing has been washed frequently . The other dog is wearing a leather collar stitched more with a thick thread, not sure if cotton or poly as she want move enough to look, fast asleep. Love the collar so very bright and cheerful. For my dogs it looks a little too deep..