Never hurts to ask - I bought a pair of brand-new, never mounted, Coronation Aces for $70 once because Wilson sent the shop the wrong size for another customer. The shop made the mistake of sharpening them before checking the size on the blade itself.
Which is a lesson for everyone: when you order something, check the ITEM for the size before having blades mounted or sharpened.
I've seen cases where a boot was in the wrong box, the blades were marked wrong, and the fitter just didn't notice that a "C" width was ordered, but a "B" width was received. When you order, write down the size/length/width and bring the paper with you for pickup.