Our industrial turned contemporary open ended envelope with a great string and button closure. It is the standard business size for an 8 1/2" x 11" folded in thirds. You can call it navy but look closer. It is really more sophisticated, more complex, more developed... and yes night is the new chocolate. It is clean and fresh and is a great balance for so many interesting colors. The US Post Office says that these envelopes need to be hand cancelled (a $0.12 surcharge). However, most branches seem just fine with them. To be perfectly safe, we recommend you bring them in to be hand cancelled and see if they charge you. Size - 4 1/8" x 9 1/2" When designing, remember that darker colors may rub off on lighter colors. Consider using a layer (such as tissue) between the different colors.