You might consider 'kitty clips,' used to make cat collars. They are a very small side pressure opening connector that looks like a buckle and connects, but does not cinch like a buckle, available on a lot of sites. But each end of the clip must be sewn to the fabric, tape or webbing. If you want the ones with the jaws that clinch onto the hem of the fabric, you might try the notions section of Joanne Fabrics or other sewing outlets. But these types of clips tend to abrade and eventually tear the fabric hem.
If you have round or D rings to clip onto, you might look at the NiteIze S-biners that come in a number of small sizes: http://www.niteize.com/collection/S-Biner.asp