First class package international service packages cannot exceed what combined dimensions?

First-Class Package International Service has specific dimensional limits to ensure efficient handling and delivery across international borders. The combined dimensions refer to the sum of the length, width, and height of the package. For this service, the maximum combined dimensions must not exceed 36 inches. This regulation helps maintain a streamlined shipping process, preventing oversized packages that could disrupt standard shipping protocols. Understanding these limits is crucial for ensuring packages meet the criteria for this service, thus facilitating timely and effective international shipping.