Dynafish Xiaonian Sizing

I know this question has been asked a lot but I'm going around the houses with sizing before I order.

I wear a UK 11.0 in Novablast, which is a 29.5cm, insole length 30.7. I have enough room in the length in these and wouldn't want any smaller.

My foot measures 28.5.

What size should I go for in Dynafish sizing?