These are all handmade by a very clever glass artist, Katie Lynn, based in Essex and as such, these will vary from one to another.
Each one measures about 6cm by 5cm - they are flat on the reverse and curved on the front.
A hanging loop is at the top.
Each one comes in an organza bag, ready as a gift.
I have to point out that these will break if dropped or treated roughly because they are made from glass.
They can be cleaned with a soft, dry cloth.