Keep in mind, First Class is for 13oz or less

cjeangrover ...

On your book site I add 1 book at .5lbs and get:
United States Postal Service (First-Class Mail (2 - 5 days)) $4.42
United States Postal Service (Priority Mail (2 - 3 days)) $6.45
United States Postal Service (Media Mail) $3.88
I double the quantity to 2, and that is 1lb so I get:
United States Postal Service (Priority Mail (2 - 3 days)) $6.85
United States Postal Service (Media Mail) $4.27
You will not see First Class on 1lb as that is 16oz ...

samanthavv ...

What weight are you trying to ship?

What are your Tare settings?