Hello, I am new on here recently. Such helpful ppl on here with much experience and good ideas to share. Hope you are doing well and found a good high seat. This has been one of my obstacles, too. I am 5’8” and although not way up in the sky, my legs are longer than my torso half. All of our chairs, sofa, and loveseat are too short since my posterior hip revision. I take at least one high cushion with me and sometimes two, depending on where I am going. I cannot sit for long periods as pain and stiffness are present. I know this will eventually get better with time. Looking forward to hearing how you are doing after your surgery, and hopefully you got the high chair/sofa thing sorted out!