Sort of.
It's true that LCD screen size is "true" size while CRTs are typically an inch smaller because they're sold by the glass tube size which is partly covered by the plastic case.
CRTs don't have a native size quite like LCDs.
An LCD has a fixed set of pixels and can only show smaller resolutions by blacking out part of the screen or by spreading out the low resolution pixels and creating other pixels in-between (which can be blurry).
CRTs can truly adjust the number of pixels shown, anywhere from 320x240 up to a limit that usually increases with larger screens. There is no "native" resolution for a CRT, just a generally recommended one. Many people with good eyesight run a 15" CRT at 1024x768, I have lousy vision and ran my 17" CRT at 800x600.
LCDs are sharper than CRTs, so while the recommended resolution for a 17" (=16") CRT is 1024x768, 17" LCDs are all 1280x1024.
If you want to buy an LCD and aren't sure you'll like a 17", 1280x1024 one, then go to a computer or office supply store and look at one in person. If you find yourself squinting, then you probably want to get a 19" LCD which also usually has a 1280x1024 resolution (so the pixels are bigger / easier to read).