This is a miniature replica of an Armet, a type of knightly helm popular across much of Europe in the 15th century. This piece also includes an inbuilt gorget.

This miniature helmet comes complete with a wooden stand and makes for a great desk (or mead bottle!) ornament. 

Approximate specifications:

Helmet:
Weight: 510g
Height: 20cm

Stand:
Weight: 100g
Height: 18cm
Diameter at base: 10.5cm

Please note this is a miniature helmet. It will NOT fit on your head!