11 7/8" length; Adjusts from 8" to 12 1/8-IP. This socket adjusts from 8 to 12. Order our 12 Drip Candle Covers and simply cut the cover to the corresponding length of the 8-12 adjustable socket.Paper shells are not included with our sockets and they should not be used without the protection of candle covers. If additional protection is required by your Underwriters Laboratories Field Rep; you may instead use 3M #69 Glass Cloth Electrical Tape. (Class H Insulation). Ask your Underwriters Laboratories Field Rep for more details.