If your taste in clothing leans towards the darker side then these skull belt buckles might be just right.

Plenty of dead things to choose from - even hinged-action buckles (or should that be unhinged?) 

Dead or undead, there's a skull buckle here for you.

Cross shield with skulls and sword belt buckle
Cross Shield with Skulls Belt Buckle £14.49
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Good guys wear black belt buckle with skull
Good Guys Wear Black Belt Buckle £14.49
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3D pirate skull in a hat belt buckle
Pirate Skull Belt Buckle £14.49
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Skeleton's hand belt buckle
Skeleton Hand Belt Buckle £14.49
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3D skull belt buckle with moving jaw
Skull Belt Buckle with Moving Jaw £16.49
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3D belt buckle of a skull wearing a top hat and smoking
Skull with Top Hat Belt Buckle £14.49
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