The hooks have a simple trigger button release system making them easy to use.
The size of the hooks are as follows:
Length: 1. 5 inch
Width: 0.75 Inch
If you would like a smaller or larger quantity please convo me.
These can be used to make the Sandi ID wallet (the last picture)- not only a grab and go pouch for holding the bits and bobs you always loose in your bag - coins and hairpins and no doubt more, but also an ID holder for work IDs and transport cards. The free tutorial can be found here (http://mel-allwrappedup.blogspot.com/2011/10/sandi-id-wallet-tutorial-snap-pouch.html).
They are also the ideal size of lanyards as shown in the last picture.