Sodium chloride crystal molecular structure
Model for chemistry class
It is not a kit, it comes as in the pictures

Size = 19.5 cm x 19.5 cm x 19.5 cm / 7.7 in x 7.7 in x 7.7 in
Weight = 561 grams / 19.8 oz 

Depending on the country of the buyer, import charge may occur