Abstract: An adjustable closure for overlapping parts of clothing comprising a rail 1 and a slide 2. The rail 1 has a plurality of projections 4, and is attached to one of the overlapping parts. The slide 2 comprises a mounting frame 13, an actuating frame 20 and sheet spring 21, and is attached to the other overlapping part. The mounting frame 13 has a bottom 9, rear walls 10a each having a ceiling 11a, and front walls 10b each having a ceiling 11b at the lateral ends of the bottom 9, engaging strips 14 at the rear edges of the rear walls 10a, slanted edges 10c at the rear edges of the front walls 10b. The bottom 9, front and rear walls 10a, 11a and ceilings 10b,11b make a sliding space having a width that allows the movement of the rail 1.