We're All Mad Here Pocket Watch Necklace With Handmade Glass Front D A beautiful antique goldtone working pocket watch on a very long chain with a stunning Were all mad here handmade charm. The Fob Watch measures 4cm top to bottom and the pocket watch measures 2.7cm in diameter and is hung on a 32" matching chain. The watch is battery powered and the front opens by pressing a button located on the top of the watch (open face shown in 2nd photo).