I don't know about the avery blinds but kill zone layout blinds are spec'ed as follows
Weight: 17 lbs.
Folded: 47” x 17” x 8”
Open: 86” x 36” x 20”
Im no Math pro but I'm 6 feet tall which is 72'' so 6'6'' is 78''... seems like you will have a bit of leg room with this blind. the only problem I would see is concielment with this KZ blind... however, its nothing that a few strips of fastgrass and some zip ties can't handle... Also this blind is sale priced at $99.00