USPS Exam 421-Sizes Exams 100% Accurate!!

Domestic Letter Size - ANSWERMinimum 3.5 in high, 5 in long and .007 in thick Domestic Letter Size - ANSWERMaximum 6 1/8 in high, 11 1/2 in long and .25 in thick Domestic Letter Weight - ANSWER3.5 ounces Domestic Postcards - ANSWERMinimum 3.5 high, 5 in long and .007 in thick Domestic Postcards - ANSWERMaximum 4 1/4 high, 6 in long and .016 in thick Domestic Flats - ANSWERMinimum 6 1/8 high, 11 1/2 in long and 1/4 in thick Domestic Flats - ANSWERMaximum 12 in high, 15 in long and 3/4 in thick Domestic Machinable Parcels - ANSWERMinimum 3 in high, 6 in long and 1/4 in thick Domestic Machinable Parcels - ANSWERMaximum 17 in high, 27 in long and 17 in thick Domestic Machinable Parcels - ANSWERMinimum weight 6 ounces Domestic Machinable Parcels - ANSWERMaximum weight 25 pounds Irregular Parcels - ANSWERMaximum 3 in high, Maximum 6 in long and less than 6 ounces Irregular Parcels - ANSWERRolls and tubes 26 in or less Outside Parcels - ANSWERMinimum 17 in high, Minimum 27 in long and thicker than 17 in Outside Parcels - ANSWERWeigh more than 25 pounds or 15 pounds if high density Outside Parcels - ANSWERRolls and tubes longer than 26 in Outside Parcels - ANSWERMaximum weight is 70 pounds