Here are the lamps I want

And here are the ones I can afford from Target :)
They come in a 14" & 17.5". Thanks so much!

"What size lamps are standard for bedside table &/or night tables? "

There is no "standard".

Lamp height would depend on the height of your bed, the height of your tables, and what you need the lamps for.

LuAnn took the words right out of my mouth :)

Why don't you purchase one of both sizes, two shades that you like, and try them out? Return what doesn't work and pick up the other pair.