4 brads - two bikinis (matching tops and bottoms). Acid and lignin free. Bikini top measures approx 2cm x 1.3cm and bikini bottom measures approx 2cm x .7cm. These look great if you mix and match them! NOTE: Photo shows a sample of the brads. You will get a mix of two different matching coloured bikinis. Not all the colours available are shown in the photo.