---
title: "What USPS service should I use if I want to send large envelopes under 15.994 oz, letters up to 3.5 oz, and postcards?"
url: "https://www.stamps.com/faq/what-usps-service-should-i-use-if-i-want-to-send-large-envelopes-under-15-994-oz-letters-up-to-3-5-oz-and-postcards/"
type: "faq"
modified: "2025-10-08T15:38:40+00:00"
---
First-Class Mail International®