This is the iconic jetpack from the rocketeer! Our jetpack kit comes with a mounting plate you can use with straps, or it can be used with one of the accurate leather mounting vests available online. We offer two sizes: Large is meant to be screen accurate and is best for adults.Large is about 20" wide x 25" tall x 8" thick. Small is scaled to 70% and is best for children or very small adults.Small is is about 14" wide x 18" tall x 6"" thick. You will need the following hardware to complete the kit. Large: 4 M4X16 screws for the mount plate4 M3x12-18 flap mount2 M3x25 tapered head2 M3 nuts8 M3 x 12Tubing about 4.5mm ID about 5' long Small: 4 M3X12 screws for the mount plate4 M2x10-14 flap mount2 M2x18 tapered head2 M2 nuts8 M2 x 8Tubing about 4mm ID about 4' long The screw holes are intentionally small to ensure a snug fit. You may need to drill them out a little. Our kit is based on a design by drokle