Given the specs I had when I shipped 2 out, I divided that by 2 so here is a very close estimate of each GPU dimension/weight shipped:
4 lbs, 8.5 ounces
16 inch x 9.5 inch x 3.75 inch

With that in mind, I would multiply the weight by 11 GPU, and also multiply the height (3.75 inch) by 11 GPU, which should be:
49 lbs, 8 ounces
16 inch x 9.5 inch x 41.25 inch

Shipping from 94564 zip code in USA.