Round Nose Fish sizing

I'm looking to buy a Lost RNF quad. I've been borrowing one that's 5'8, but I'm only 5'7 and around 12O lb. Should I get one in 5'5 , 5'6 or 5'4? Don't think it'll make much of a difference, but who knows?
Welcome to Surfing Waves Forum. Surfing related chat, discussion and information.
https://surfing-waves.com/forum/