when I bought my bed and mattress TOB, I was housebound and my firend brought me over to the furniture store in her car but then the beds were upstairs (no lift/escalator) so, because she knew me so well and what I liked, she lay on all the mattresses and beds like a little goldilocks and bought the one she thought I would be happy with, great choice and I am still snug in it so if you could get someone close to you to maybe try out beds, take photos and send them to you and choose on your behalf, that might be a good idea. I know it's hard when you cannot really get out and go for the bed that's best suited for you if it is the 4"