Does anyone know the surcharge for square envelopes (5 3/4 x 5 3/4) and less than 3 ounces? I saw a mention somewhere that it may be $0.44 + $0.20 surcharge but want to confirm. Unfortunately I searched high and low on the USPS.com site and could not find the answer. All I ever found was it "could be subject to a surcharge." Next time I visit a USPS location I will confirm but until then if anyone knew for sure I'd appreciate knowing before popping a card in the mails. Thanks!!