Hi Melissa! Crickets should be sized same as distance between frogs eye's. That means your bigger frog will be eating smaller crickets that it can handle. Also, be aware that most frogs will eat smaller frogs that fit in their mouths

.
You can feed all crickets they will eat in one seating without leaving leftovers. By using a small glass bowl (around 2 in. deep) you can keep crickets in one place and monitor all frogs are eating better (crickets won't escape).
Remember to dust crickets with CA/D3 2X and vitamins 1X weekly on different days with skip day in between. Good luck

!