Are Raleigh frames marked anywhere to indicate what size they are?

I have a shot at a nice frame and fork, but the owner does not know the size and I can't tell either without tires and wheels on it.

Measure the seat tube from the centerline of the bottom bracket to the top of the top tube.

If the owner has a tape measure or yardstick, measure from the crank spindle (or center of bottom bracket) up to the middle of the top tube/ seat tube junction. That's how traditional frames are measured. What year frame is it. Is it a traditional type frame or a sloping top tube style.

It's a 2003 sc40 hybrid (slope). Please, before y'all start calling it crap, I'm a Clyde looking for a solid Rails-to-trails rider for fitness. This bike got very good reviews as a solid well made frame. And I can get it for almost nothing but gas to go get it. I'm a fat old cranky bast*rd looking for comfort, not land speed records!!!! LOL

And thank you very much for the amazingly fast responses y'all.