Vestrum works with two types of fabrics. The regular fabric and the TK fabric. The TK fabric is a slightly lighter fabric.
Italian size chart:
Size 34 NL = Italian size 38
Size 36 NL = Italian size 40
Size 38 NL = Italian size 42
Size 40 NL = Italian size 44
Size 42 NL = Italian size 46
Size 44 NL = Italian size 48