These are the 70's triangle cut Halter Tops that will fit most body types. Please measure yourself to make sure these items will work out the way you are hoping.
You can build rat agility equipment out of legos or other interlocking building blocks. Just make sure the item you have crafted is safe for the rattie to walk on or run across.
RAT FABRIC COVERED FLIP FLOPS WITH RATTIE CHARM (XL)
In the high plains of South Dakota, USA