Very pretty but a tad skinny.
Have you just got him/her? Do you have more than one?

Awwwwww stunning!

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Got agree with Jinx there, it or they are abit on the skinny side, but it or they are very pretty

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Only had it a week it came from a shop that had 4 in one tank so its a good bet thats why its a bit on the skinny side.

Any ideas on how to fatten it up, its eating around 10 crickets a day

Also any thoughts on what sex it is

Yeh i figured he was recently bought from the shop.
Try him on some wax worms, only offer a few, and then give him a couple a day. You dont want him hooked on them. But if he eats them they should put some weight on and then go back to crix and only feed waxies every so often as treats.
They be full of fat y'see.
But it does sound like he's eating well, so thats good.