Twice as many blue beads as purple beads in the necklace are 2*7 = <<2*7=14>>14 beads.
Sue also has 11 more green beads than blue beads, a total of 14+11 = 25 beads.
The necklace has 7 purple + 14 blue + 25 green = <<7+14+25=46>>46 beads.
#### 46