Question: how many forever stamps for 5 ounces?
Answer: If the item is flat, then $1.84 plus a 21 cent non-machinable surcharge, i.e., 5 forever stamps or 4 forever stamps and a 5 cent stamp. If lumpy, the it needs to go as a first-class parcel for $3.75 - eight forever stamps or seven forever stamps plus a 25 cent stamp.