Leather straps with cross-sections of 3mm, 4mm, 5mm and 6mm are thicker straps, thus stronger but also stiffer. They look good in bracelets and necklaces. These straps are also used for key rings, handbags and other hand-made products. The 3 mm strap is also an alternative to bases for modular Pandora beads, they look interesting when glued to metal decorative tips.