In order from very slim to reasonably slim.. Victorinox Alox Bantam, Cadet, Solo, Pioneer, Farmer. All these are awesome and will do their job the next few decades. My urban EDC is the Cadet with keyring filed off. Slim enough and more comfortable to hold than the super slim Bantam. Farmer if I do some more work. I prefer it over the Pioneer because it has the super useful saw, which does not add much bulk at all. Have a Solo, too, but never use it. Prefer to have the extra tools in the Cadet and they are about equally slim and weigh almost the same. Solo is bigger and has a thicker blade and scales, so they end up abiut equally thick. So I suggest the Cadet or the Farmer as the best options in Alox SAks.