Cubiscan measurements

New seller here.. So I sent product to the FBA warehouse and didn’t realize until after that some variations of my products were packaged in a way that puts it into oversized size tier and doubles fulfillment fees. I’ve fixed the packaging issue, but now I have 60 units in the fulfillment system that will likely be charged the higher fee. Before I do a removal order, I wanted to confirm what they were actually measured at, as the size is borderline and maybe they measured just under 18in. The size in the manage inventory tab is whatever I set it to, and the fulfillment reports show that same size. Would one unit need to be sold before I can see the cubiscan measured size? Or is there somewhere it would be displayed? Thanks!