On page 4-14 of the 1941-1948 Ford Book offered by the V-8 Ford club it states. "Tires for almost all Ford passenger cars of the era were size 6.00 X 16", four ply". It goes on to say, "One deviation, which did occur, was the installation of 6 ply tires on station wagons"….."Also at extra cost the station wagon could be obtained with one size larger, 6.50 X 16" tires- again 6 ply, and the related larger size tire cover (part #91CS-1351)". You have the standard cover. My 1946 Woodie had what appeared to be one original tire and it was a 6.00 X 16".