Hello there @Seller_3kRrk8VnMyI6h

My name is CR and wanted to first of all welcome you to the New Seller Community within our seller forums. I see that this is your first post - welcome!

I wanted to hop in here to see if I could provide you with some information. In most instances you can update dimensions you've provided by editing your listing and product information.

Please note however if you have submitted inventory to FBA you may need to request that your units be remeasured as units at FBA have their packaging dimensions provided by measurements at the Fulfillment Center.

CR_Amazon