Size 3/32" diam x 1/8" length x head between 1/8" & 3/16" ( see second picture)
Quality solid copper (NOT copper plated base metal) rivets. They are made to fit a 3/32" hole but sometimes you have took take a small round file and enlarge your hole just a hair for the rivet to fit in. I use a small ball pein hammer to flatten the other side to join 2 or more pieces of metal together. If you using them on one layer of the brass blanks I sell, you will need to cut off any excess before flattening the end of the rivet.
2nd picture: measurements
3rd picture: the metal punch I use
More RIVETS Here: http://www.etsy.com/shop/Rhinestones4u?section_id=12261815
Great little copper rivets for mixed metal jewelry. Lead and Nickel free from right here in the US.