need help with tire look/fitment

[teamradrz1]

Ok I purchased new wheels for my Blazer 18X10s and I lined up some good used tires on CL that are 375/50/R18s bajas with about 80% tread left, I talked the guy down to $500 for the set and I'm happy with the price. the problem is when I went to a conversion site it said the tires would be 36"X14.5" and I have 35"X12.5"s now. so I'm scheduled to pick them up tomorrow but I found out from the tire site that these are 33"X15.5" so wanted your HELPFULL opinions if this would still look good on my Blazer or am I really going to miss the extra 2" of tire height? I don't really want to flake out on the guy but I don't want to spend $500 on something I'm going to have to turn around and sell either. My friend says just cancel the sale but I feel obligated I hate flakes and don't want to be thought as one.