dub diver,
i have a similar sized foot as you (10.5 US) and mine is on the narrow side as well.
have you tried them with thicker neoprene socks? a 5mm or 6mm sock might be the answer--even double layer thin socks if it is all you can find.
i have no experience with the picasso footpockets but i do have a pair of omer 44/46. they are certainly wider than my foot but with a 5mm neoprene sock the fit is snug. i can also dive with other thicknesses of sock, which affect the fit accordingly.
i have heard of people gluing/epoxying parts of, or whole insteps from running shoes or "superfeet" type inserts into the footpockets to adjust the fit. might be worth a try if the socks don't help. i read about it here on db somewhere; a search would likely turn it up.
as far as buying new fins, i was in the same boat as you regarding not being able to try them on first; which led me to start this thread
. i collected as much info as possible from other divers, here on the forums, with similar sized feet who also owned the brand i wanted. additionally, i ordered a few different thicknesses of socks when i bought my fins and wetsuit (ranging from 3-6mm), which allowed me to "adjust" the fit when the fins arrived.
if you plan on ordering omer fins, as far as i can tell, you should order the same size 44/46 you have now. unless you will be diving in warm waters only then you might(?) be able to squeeze into the smaller size wearing a very thin fin sock for swim fins, although length could pose an issue.
hope you get the problem sorted out,
sean
vancouver, canada
