My cat is pretty small, so the default model is basically sized for kitten collars. I had five collars so I printed five collar displays and one base. Two of the collars were ties that take up more vertical space, so I needed a 9" tall rod to get everything together into a single unit.
The f3d starting parameters (65mm display circle diameter) were designed to accommodate an ~8" collar circumference and friction-fit on a 1/2" dowel. A 75mm diameter display circle would fit a ~9" collar, a very common adult cat collar size.
You're welcome to use this model to display dog collars, but it'll work best with small collars.
Printing specs:
Non-printed materials: a stick, maybe some glue to supplement the friction fit.
To adjust the sizes in Fusion 360 (free for personal use), open the f3d file and go into Solid > Modify > Change Parameters
Please note that the dimensions are in millimeters even though I keep mentioning inches.
Here are the parameters most relevant to resizing for your needs:
Collar Display parameters:
Collar Display Stand parameters:
There's two versions of the stand: a slimmer model and a bulkier model. The overall height/width/hole dimensions are the same between the two. Just use what you prefer.
The author marked this model as their own original creation.