Pub. L. 86-682, tit. 39, pt. IV, ch. 61, sec. 4305
Size and weight limits
§ 4305. Size and weight limits The maximum size and weight of domestic airmail and air parcel post is 100 inches in length and girth combined and 70 pounds.
Pub. L. 86-682, tit. 39, pt. IV, ch. 61, sec. 4305