How do they work?

Simple! Case-Ons snap onto the (pre-existing) lipped edges of CD jewel cases. Check out a case that you already have. Notice the raised lip? That's all it takes!

Case-Ons work with most standard-size CD jewel cases. Case-Ons also work with doubled-up slim cases. For tips & tricks and a look at the Case-On family, view the design guide below (included in Case-On purchases). And if you have questions or just want more details on the design of Case-Ons or CD cases, then check out the FAQ section on the right.


Will Case-Ons snap onto all of my CD cases?
Probably not, unless your library comprises only the standard and slim cases. But most CDs were at one time delivered in the standard case, so if you have at least a couple of these lying around then you're in business.
Are all standard CD jewel cases created equal?
Yes. Every standard CD jewel case measures the same length, width, and thickness. Approximately 5.6 x 4.8 x 0.4 inches (142 x 124 x 10 mm). In addition, most case edges contain a lip of raised material. This lip is what provides the primarily snap-fit attachment means for the Case-Ons.
Are all CD case edges created equal?
Nope. However, Case-Ons have been designed to take into account these slight variations. In some instances, the Case-Ons will securely snap onto 2 lipped edges, but in other instances a lip will not be available so instead a strong, frictional grip will arise.
How many Case-Ons do I need to join together 2 cases?
1. But if you need extra strength and stability, 2 Case-Ons spaced apart are suggested. And if you wanted, you could fit up to 9 Case-Ons between 2 cases, but that may be a bit excessive.
How many different Case-Ons are there?
Currently there are 4 Case-On styles, each with a different construction ability. See the design guide for an introduction.
Why does the Right piece have an offset alignment?
The offset is an intentional feature that allows perfectly cubic constructions using only 1 Case-On design (and 6 CD cases). Check the design guide for assembly tips. The offset also matches the profile of 2 arms of the Tee piece, making the Tee piece interchangeable with both the Straight and Right pieces.
What are the holes for?
Lots of things. Structurally, those portions of the Case-Ons are not necessary, so eliminating the material saves on resources and helps with manufacturing. But probably most important to you, and if you haven't discovered already, the holes act as guides to hold the Ball piece in a ball-and-socket configuration. They also readily enable hanging your displays. If you think of anything else let us know and share your Onstruction idea!
How do I go about prepping my photos/artwork for case display?
You have a couple options. The large, back panel frame is 4-5/8 x 5-3/8 inches. If you print your photos at home then just print them to this size. Otherwise, print 5x7's and trim them manually. However, for a cleaner look, and to use all your 4x6 photos, we suggest adding a custom-cut, 1/2" wide frame. Check out the Frame Onstruction example. We provide custom-cut frames in the Shop so pick up a set today!.
I have OR need extra cases... what eco-friendly options do I have?
Check out You can dispose easily or buy reused cases cheaply. Also check out your local reuse centers. Pittsburgh Center for Creative Reuse is one example of many around the country.
Do Case-Ons have a favorite band?
Yes, but it will remain a secret until that band returns the admiration!
© Copyright 2012
Product of Hojjer Designs, LLC
Patent Pending