Synonyms of Hiccups, Chronic. General Discussion. A hiccup is an involuntary spasmodic contraction of the muscle at the base of the lungs (diaphragm) followed by the rapid closure of the vocal cords. Usually, hiccups last for a few hours or, occasionally, a day or two. However, chronic hiccups are ones that continue for an extended period of time.
Lets answer your question in several parts; The Short Version First: 1: First Class Letter - Max weight is 3.5 oz. 2: First Class Large Envelopes - Max weight is 13 oz. 3: First Class Parcels - Max weight is 13 oz. Long Version: You asked about âFirst Class Mailâ and the weight limits. Mail is defined as âLetters and packages conveyed by the postal systemâ. See Google.
The term âlarge envelopesâ (also known as flat mail) refers to First Class Mail sent in envelopes that exceed either 6&frac18;â in height, 11Â½â in width, or Â¼â in thickness.nvelopes used for flat mail cannot be more than Â¾â thick, 12â high, 15â long or weigh more than 13 ounces. The USPS considers any envelope bigger than this size to be a package, and will be subject to parcel prices.