I’m 5’8″ and an all-important half. My Tk is a 54. Kinesis did suggest a 57, but I looked at the eff top tube length and stuck to my own instincts. I fits me really well with a 100mm stem and compact ergo bars. If you are really short in the torso and arms you might want to go with the 54 – but the head tube is very short so you will end up with a lot of spacers under the stem.
Short answer – compare the eff top tube of the bike that does fit you and work from there.
At a guess – you would want the 57, possibly with an inline seat post and 100mm or even 90mm stem. Added benefit of the 57 is less chance of toe overlap, which you will get with the smaller one.
Great frame though – love mine.