When yous get togeddah with dees guys, it might be beer pong, crisco twister, or "borrowing" the neighbor's garden gnome. You never know what will happen with da Fungis! The examples were knit with US size 3 (3.25 mm) DPNs & various worsted weight cotton & wool yarns (circulars & Magic Loop can be substituted for DPNs), but virtually any yarn/needle combination would work as long as the gauge is nice and tight. They measure about 4 inches across the cap & 4 inches tall, and can literally be knit with scraps of yarn, so it's a great stash buster. Two different caps are included, so you can knit yourself an entire silly mushroom forest!