This is the front of the World War 2 Draft Registration Card for my grandfather, John H. Ufkes.
I didn't include the back of the card in this blog post, but it includes physical information and a description.
FamilySearch has a few cards for men of this era, but in general these cards have to be requested from the National Personnel Records Center in St. Louis. Usually when someone thinks of a relative registering for the World War 2 draft, they think of someone approximately the age of this registrant--Granddad was 23 at the time he registered.
There is more information on requesting records of Selective Service from this era (men born before 1960) here.
This procedure is also how I obtained the registration card for my other grandfather who was born in 1903.