Pinhead might be a bit small, but normal size is too big. Something like Q3 or L3 whatever they call them. A good guide to feeding size is the cricket should ideally be no bigger than the spiders carapace.
If it is.. if you can't get anything smaller (obviously adult crix are out of the question for such a small spider!) then take a cricket one size up and either kill it or crush it a bit so it can't attack your spider. Your spider will then have more of a chance of catching it and killing it

GBB's are generally great with food. Mine eats anything!