We offer free shipping on orders over $75, except for oversize items. We include product dimensions and weight for each of our products. We want to add a fixed fee for items over a certain dimension or weight.
Dimensions 24"x X x X over 3 lbs = $10 fixed fee
Dimensions X x 24" x X over 3 lbs = $10 fixed fee
Dimensions X x X x 24" over 3 lbs = $10 fixed fee
Dimensions 32 x X x X over 10 lbs = $25 fixed fee
Below orders of $75, we would like to charge actual shipping cost for UPS and USPS based on product dimensions and weight. Over $75, free shipping, plus oversize fee if applicable.
I haven't been able to find an extension that can do this.