My little one is 1/3” to 1/2”. Has jot molted yet but spends almost time in its burrow. Begins moving up when i shine light to make sure its aliveOf my collection my h. mac. was SUPPOSED to grow the fastest based on the research I have been able to find on it. It is currently my slowest grower. 1 molt since I got it in march. the others have all more than doubled in the same amount of time. How big are your little ones? My H. mac will only eat small crickets, but I have seen flightless fruit flies at the store.