From Space News:
Like the current satellites, the Next Generation Optical satellites will feature telescopes with an aperture size of 2.4 meters. Although Goodrich ISR Systems has built optical telescopes for the NRO in the past, industry sources said its most recent applicable space experience was the flawed primary lens for NASA’s Hubble Space Telescope, which was launched in 1990.
Sounds like Space News has been talking to DNI James Clapper.
The picture of Elvis is from artist Maurice Bennett of New Zealand and is for comparative purposes only. The Toastman, who uses toasted bread in creating his art, appears with his portrait of Elvis Presley. Toasted Elvis is 2.4 x 2.4 meters square and consists of 3,525 slices of toast. 
Songs of Space & Nuclear War 