[Old Man Dave]

A 5mm open cell inside suit from Omer, Cressi etc will do. An Elios made to measure is probably the most highly rated with a MTO Diveskin the cheaper alternative. Something like a 3mm vest can be worn as well if the temperature plummets. Not many people opt for thicker than 5mm but 6.5mm is available. Boots depend on your fins. 3mm socks will do but 5mm might be needed if you get cold feet. You might just fit 3mm and 5mm in the same fin but not ideal. Fins come with plastic, fibreglass or carbon blades. You need to research this a bit to get the right ones. Also footpockets for the fin blades vary a lot and again depends on your personal feet shape and your preference. Trying before you buy would be a good idea if possible. Omer Alien seems one of the most popular masks at present. However masks like fins depend on lots of factors. No good having a fancy mask if it doesn't fit you.

I use a 5mm Immersion open cell inside, cammo nylon outside suit for 10 to 18 degree water temp with a 3mm vest under for 8 to 10 degree wintwer diving. Just trying some 4mm elaskin Beuchat bootees and use Omer Ice 3 fins with the Omer footpockets. Use a technisub Luna mask as I need lenses.

Hope that helps as a starter. lots of info available if you use the search button.

Dave