The X-15 is to date the fastest and highest flying manned aircraft ever flown.
North American X-15
This rocket-powered research plane reached speeds exceeding Mach 6.7 and hit altitudes as high as 67 miles above Earth. This 1/32 scale X-15 measures over 18" long and comes with drop tanks and the NASA meatball right on the base.
18L x 8.75W (wingspan)