I purchased 9 thuja green giants from Fast Growing Trees Nursery and planted them along a fence in my backyard a little less than a year ago. I ordered 1-2 foot trees and all the trees were at least 1 foot tall. Several were actually a bit taller than 2 feet. They were packed very well and arrived in great condition. They didn't do much the first growing season. They are probably 6 inches taller (a few are up to 12 inches taller) than when they arrived. All 9 are healthy, although they are slightly tinged with brown this winter. I am hoping they take off this year and really start growing.
