These jumprings are bright pops of colourful goodness, they are 10mm, 20 gauge in size. There are 50 pairs or 100 pieces give or take a few in each pack.  The little holographic bags they come in are reusable ziplock bags so super handy to store them in. 
 
They are a coated base metal and are the best quality I have been able to find.  When using ANY plated or coated jumprings we recommend using your fingers to open them - if your using them a lot and you would rather use pliers we recommend using flat needle nose pliers that are smooth with no texture.  Although the coating is good quality it will scratch when not handled correctly.