"These double mini cord locks are great for quilts and stuff sacks. You can never have enough cord locks. They measure 1/2″ high and fit 1/8th or 3/32 shock cord.
 
Specs
Dimensions 1/2″ high, fits 1/8″ or 3/32″ shockcordWeight per each: 1.05 Grams"
 
Here at Henge Hammocks, we find these a little more robust than other makes that use a 'softer' plastic.
 
Sold in sixes.