Infinity Loop Bag Dimensions + Formula

I'm working on a bag in the shape of a 3D infinity loop, which I've mocked up using paper on a miniature scale (see attached videos).

I'd like some assistance in working out the dimensions of the four final component pieces (the main strip that creates the loop, the base and the top corners that fill in the space in each loop) so that they fit together and create the shape in 3D space with the desired height and width etc.

I'd also like to come up with a working formula so that any future adjustments can be easily applied to all components (e.g. making the bag 2cm taller = the dimensions of all pieces will be automatically adjusted.)