How do i know if these records are 33 or 45 rpm?

I have some old records i want to sell on ebay. How do i know if they are 33 or 45? i dont have a player

Tom K says:

November 14, 2009 at 9:53 pm

They should say on the label. Also, 33’s are generally albums with many songs and about 12 inches across. 45’s are generally singles with just one song on each side and about 8 inches across.
Catnip says:

November 14, 2009 at 9:53 pm

I think the smaller ones are 45 and the bigger ones are 33. Usually anyway.

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