Depends how you measure the length. The glue deck I measure with the concave it measures about 31in and measure straight across it’s about 30.7
I’m about 5ft 9 with size 9 shoes I find 14in wb to feel good without having that spread out longboard feeling
I generally measure straight across, just because that’s how I was shown long ago. With the concave might make more sense, but straight across gives me the reference I’m looking for. Aaaaanyway, I find length to be a highly important, oft neglected measurement. I’m barely 5’8”, short legs, size 10. I can adjust to most wb’s, prefer shorter, and most widths, prefer 8. But boards over 32, and under 31 fucking mess with me.
Of course this makes me want to try it. Mostly because that shape is super flat.