Korkers Wading Boots

I wanted to buy a par of these but I'm worried about getting the wrong size. My number is a US 8 1/2 but Korkers don't do half numbers. Does anyone know if any shops in or around Dublin store this brand so that I can go and try them on? Would you recommend I buy size 9 or 10? I don't have wide feet and I would be wearing them with neoprene waders and/or trekking socks (medium thickness). Cheers!

No suggestions guys? Size 9 or 10? If I get the wrong one I promise I won't hold anyone responsible...