These are 2.5in / 6.35cm double sided acrylic charms with a rainbow metal lobster clasp keychain attachment. The front of the charm is smooth and features either Solid Snake and Otacon, or Big Boss and Kaz. The backside of the acrylic is rippled and textured, and looks like water -- please look at photos 4 and 6 to see what the acrylic is like!
Please note: the colors displayed on your screen and the colors of the items in real life may vary.