In almost every ‘travel’ retail store you will find luggage tags with the purpose of identifying your own case as it comes through the conveyer belt.
There is a much cheaper way of doing this, so cheap it’s free!
Find some coloured lace, it can be anything around the home, a shoelace, part of an old garment etc etc.
Simply tie it to the handle of your case.
It avoids attracting unwanted third party attention to your case, but you will be able to spot it a mile off as it pops out at the airport, enabling a swift departure.