depends on the seller (ie when they ship it) and what shipping you chose (expediated or media mail). Did you get media mail or an upgrade to priority/UPS/fedex? if you got media mail, then it is a gamble. It 'says' 6 days for delivery on the usps homepage, but when i send books via media mail it takes up to 4 weeks osmetimes. 1-2 weeks is a good estimate for media mail, 3 days is a good estimate for priority mail.