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Anthrenus verbasci
It's about 3-4 mm. I found it on the wall in my house. The varied carpet beetle (Anthrenus verbasci) is belonging to the family Dermestidae. This beetle can be a serious household pest and a pest in natural history museums, where it can damage biological specimens. While adults are pollen grazers, larvae feed on natural fibers and can damage carpets, furniture, clothing and insect collections.
Thak you Jopy for the ID! :) Mark I agree with you, but I'm not happy if I find them in my house... :(