Juvenile Leopard Gecko Weight Questions

[Rose23]

I picked up this little cutie, whom I have named Theo, on 5/12/19 from PetSmart. I'm not sure on his (or her?) age but he's little. I've never raised a leo up from a little baby so this is the first time ever. I got my other two leos when they were at least 1 year old. I just wanted some opinions on his growth and weight gain. He is fed Monday, Wednesday, Thursday, and Friday about 8-11 small dusted crickets with the correct supplements. Tuesday and Saturday he gets 8-10 small mealworms. He is not fed on Sundays. He weighed 12.39 grams on 5/19/19 and as of today 6/13/19 he weighs 18.56 grams. I'll attach some pictures below:

When I brought him home 5/12/19:



Today 6/13/19:



He's already pretty docile and friendly. I want to make sure I am giving him the best life possible!
Any Ideas of the general age range he may be?
Thanks!

 

[Newbreeder]

My 2 month old juvenile is 20g and gets fed every day although he just gets a bunch of mealworms and a couple medium crickets or lucusts.

I wouldnt worry though, seems a good size.

Although if youre worried he is too small you can always feed him more.