This is the skin that I use on minecraft multi/single player. I made it using 2 different things.
http://minecraft.decx.org/ - A website with RPG-style skin creating
http://www.minecraftforum.net/topic/3796-skinedit-new-version-13-april-alpha-3-pre-7/ - A downloadable that let's you edit/create your own skins in a more complicated/specific way. Great for the expireanced skin creators

All credit for these 2 things goes to their makers. I just used them to make my skin. Give them a try.