It’s definitely important to try them out. We purchased a 74” Victoria and Albert tub made from limestone and resin (Marlborough). It’s a beautifully made tub and I don’t know if it’s because of the material it’s made out of or what, but there is never a ring left after using it....it just stays clean.

I’m only 5’2” and I can tell you though, it is way too long to be comfortable for me (my husband is 6’3” so it’s great for him). I have to use a bath mat on the bottom of the tub to keep from sliding as there is no way I can brace my feet on the end. So do try one out if you can.

I would also check to see where the overflow drain is located because the height of that will determine how high the water level in the tub will be.

If you don't mind the price tag, consider a Devon&Devon tub from Italy. I purchased mine from a local high-end store in Los Angeles area.

I installed a tub from Tyrrell and Laing in my master bathroom a few years ago. They are made in the USA, Florida. I am sure they would customize too.
https://tandlinternational.com/

I considered T&L as well. They sent me a beautiful brochure and a paper version of the tub so that I could envision the space.

Thanks all! I did go to Fergusons, that was one of the 2 stores. They only had one tub big enough for me to truly test- MTI Elise. Anyone have that tub or brand? It appears pretty modern and I like more transitional. It was comfortable with its rounded edge on my neck. Anyone have a more flat rim tub? Is it uncomfortable?

I've never heard of T&L, I'll search that. Its seeming like I need to find tubs near me first, then choose between those brands. I normally find the best brands I can afford then go look at them to compare. I just don't want to limit my choices because I cannot find one to sit in but...then I don't want one that isn't comfortable.

Here's another option to consider:

The Wood Working Tub, handcrafted in Seattle. This one is huge, and it's their medium size. Looks like Noah's Ark. I have no idea how it compares in heat retention to a composite stone tub. Just saw it today at the store where I purchased the D&D tub, which they no longer carry. Yes, this is real wood. This company also makes boats.

We bought a airbath Bain Ultra. On their website it listed which kitchen and bath showrooms had their models on display.