If your Avery-style label dimensions are not supported by Cheqroom, you can also use the Avery Design & Print service to design special labels. (The site is free but does require registration)
Here's how it's done
In the Cheqroom Web App
In Cheqroom, export some or all of your Items to CSV
You'll receive the CSV file via email
In Avery Design & Print
Login or create a (free) account if you don't have one yet
Click Choose product to find your paper and label size
Start from a blank design
In the left menu, click Import data and pick the CSV file from Cheqroom
Pick and arrange the fields you want
Once you're happy with the results, click Preview and Print
Optionally, save the design for next time