I've got more garlic than a garlic factory growing at the mo, a pressie from the garlic co on the isle of wight. Some scapes are 10-12 inches, others less so but then they are all different types. Best thou is my elephant garlic, it is seriously big, the scapes are 14 inches & average 2.5 inches wide! If they split properly then I'll need a tractor to haul them out!