Suggestion for Improving Amazon Buy Shipping Label Options

I am writing to suggest an improvement to the Amazon Buy Shipping feature. (FBM) Recently, I encountered an issue where I accidentally selected an undesirable paper size for printing my shipping label. Specifically, I intended to print the label on 8.5x11 Letter size paper but mistakenly chose 4x6.

Currently, there is no option to change the paper size after the label has been purchased. As a result, I had to refund the label and purchase a new one externally, then update the tracking information manually. (it is not possible to repurchase the shipping label through Amazon Buy Shipping, forcing me to use external services.) This not only causes inconvenience but also prevents me from receiving the "Claim Protected" status from Amazon.

I kindly request that you consider adding a feature to modify the paper size for shipping labels after purchase. This would significantly improve the user experience and reduce the need for refunds and external label purchases.