These are a few of the more than 25 telescopes I've built in the past 9 years. Telescopes are generally of 2 major types, refractors, which uses lenses, and reflectors which use curved mirrors.
This is a small, 60mm refractor

A somewhat bigger, 80mm refractor. The focuser and rings on this one were purchased. I only made the tube.

This is a 100mm refractor.

This is a 6" (150mm) reflector I built on commission.

Here is an 8" reflector, also built on commision.

Another 6". This is a combination reflector that's called a Maksutov Newtonian. Uses both a mirror and a lens:

Another Maksutov Newtonian. This one is a 7" model and this is one my keepers. Optics alone cost $1,000.

This is a 12.5" reflector that collapses for easier transport

Here is a 10" reflector, also collapses for easier transport

And a 12.5" reflector, also collapses

That's probably enough for now ;D
Chuck