It is fully hallmarked for Birmingham 1827 - the maker's mark is hard to read but I believe it to be Tye and Kilner of Birmingham. It is approx 1-3/8" x 1" x 1/2 (37mm x 26mm x 12mm). This item is in the category "Antiques\Silver\Sterling". The seller is "yudee" and is located in this country: AU. This item can be shipped worldwide.