Snowglobe comes in 2 sizes:
Small 3cm wide x 3.8cm tall (penguin pic)
Medium 4cm wide x 5cm tall (1st pic)
Big 4.8cm wide x 5.8cm tall
 
Tree, Penguin or Squirrel.
 
Stud or Clip on.
Stud made from hypoallergenic surgical steel.