Crashed UFO Inflatable Decoration Adult Halloween. Crashed UFO Inflatable Decoration. This UFO outdoor Halloween decoration includes an inflatable spaceship, a plug-in fan, ropes and stakes. The crash landed inflatable UFO with boulders measures approximately 6′ x 10′. If your size is not listed, then we are out of stock for your size in this listing’s style. Size Chart (USA Standard). Be sure to check the size chart if you view a different item because the sizes will vary. One company’s “small” may be the same size as another company’s “medium” so be sure to check the size chart on the listing of each item you view. If your size is borderline between two sizes always choose the larger size. Major holidays include New Year’s Day (or the day after if New Year’s Day falls on a Sunday), Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. Tracking your order from 7th Avenue Costumes is quick and easy. Our goal is to satisfy you, our customer. If we make a mistake we want to fix it and we hope you will give us the opportunity to do so. Thank you so much for shopping with us!