Glittery green dice with white inking, each perfectly reminescent of the Syltherin house! The d6 contains the Syltherin house logo, while the remaining 6 dice contain several other nods to the Harry Potter series. 

These are standard-size dice: size guide. 

Check out the other house dice: 
Gryffindor - Red
Gryffindor - Gold
Slytherin - White
Ravenclaw - Blue
Hufflepuff - Black 
Hufflepuff - Yellow