I'm 169cm and 70kg and Medium is tight enough. Perfect fit, but if I put on any weight, it wouldn't fit. I'd nearly consider a large if I were you.

I would suggest a medium for the best fit.

The Axium wetsuit features two main improvements over the sprint from what I can see:

* Forearm propulsion panel
* High flex one-piece arm and shoulder construction

To me, these features make the suit more suitable for racing events where speed and flexibility is a priority.

I would recommend the Medium size for best fit.

You will need the Small / Tall size, this should fit your height well but may be a little baggy in areas due to your weight and chest size.

I would suggest a medium/large for the best fit.

1) It depends on your chest size as I found that the Blueseventy sizing is based upon athletes who are tall & slender. I'm 165cm tall, weigh 72kg, have a 100cm chest & 84cm waist. The medium fits my upper body dimensions perfectly even though my height/weight dimensions indicated that I should fit into a small. There is no way I would have been able to zip up a small sizes suit.
2) I'm really pleased with what the Axium suit has to offer, it's well priced, excellent quality & has some features normally only seen on more expensive suits. Unless you are a competitor chasing absolute performance & have an unlimited budget I think that you will be more than pleased with how the Axium suit performs especially given its reasonable price.

I would recommend going for the larger size if on the cusp. Several friends of mine new to triathlon were in the same dilemma as you and regretted getting the smaller size and had to send their suits back.

Initially bought the axium but too small and only found this out after a couple of swims. However did sell it on to a mate so didn't lose much and then up graded to the fusion which does give extra buoyancy in the legs and a bit less restrictive round the shoulders. I'm not a strong swimmer so this suit helps me more than the axium. The mate who now has the axium loves it but is a good swimmer.

Definately Medium or Medium tall