Abstract: This invention relates to a wound measuring device, comprising a transparent, flexible and bendable sheet (1) with at least a first edge (3), a second edge (4) and a third edge (5) and a cross-ruled field (7) located on the transparent sheet (1), wherein at least adjacent one edge (5) there is a ruler (12A) and the cross-ruled field (7) comprises a number of equally sized identically shaped fields (13, 14), wherein at least one corner (6) formed by two of said edges (3, 5) form an angle (?) which is less than 90°.