Here are some simple, free, downloadable raffle ticket templates for use with Microsoft Word:
Raffle Ticket Template for Word (A4 paper)
Raffle Ticket Template for Word (US Letter paper)
Online Template (doesn't need Word, and works for A4 or US Letter)
But, be warned, even with a ready-made raffle ticket template, it is quite hard to print out many raffle tickets each with a different number.
You'd think it would be a simple matter of running a mail merge to put a different number on each ticket.
It turns out to be a little bit more complex than that.
Fear not, though, you'll find instructions here:
Instructions for printing raffle tickets with Word for Mac
Instructions for printing raffle tickets with Word for PC
Instructions for printing raffle tickets with Publisher
Allow a couple of hours of fiddling around to get your tickets ready.
Or, do it in a few minutes using this simple online tool, which I built to make it easier for people to print numbered raffle tickets from their own computer: