question about size management

So I've got a female pastel and a male spider, each at about 230 grams right now. This is probably a dumb question, but how can get them both at the right breeding size when the female needs to be around 2000+ and the male between 800 and 1500? I know I can give her more food and I can give him a little less, but how do I keep the male from getting too big and keeping that weight for several years? What's the top end weight for male BPs?

Thanks,

800-1500 is more of a minimum size range for males, he will still breed if he gets larger than that. So just get your female up and feed your male enough to grow normally and you should be just fine