Should have been printed right on the seals. I know Honda and other companies will say 20x10x40 or whatever metric measurement they have, but the bearings themselves usually will have 6205-2RS or another universal stock number printed on them.
Was wondering because i can snag a set from the bearing distributor next time I am there. the NSK or other high quality bnearings in a similar size are usually well less than $10 each. Normally the only semi expensive one is on the rear drive side... The larger one.
<edit> The only reason i see going to Honda is for the seals, and even then if I can get the standard stock number, I wouldn't even do that.