Russian stove connectors rated 250 V 25 A AC. Left: plug and socket. Center: Socket. Right: Plug. (en)
Plugs and sockets may sometimes combine male and female contacts. Clockwise from top left: CEE 7/4 plug; a matching CEE 7/3 socket with exposed earth projections on circumference of socket; CEE 7/5 socket with projecting earth pin (en)
Side by side comparison of Italian CEI 23-50 S 17 and S 11 plugs and sockets rated 16 A and 10 A (en)