Mattress Sizes for those 6'+

My son is growing out of his crib, can anyone recommend a twin or full size bed? His room isnt that big but a there are more bed frame options for a twin size bed. I full size would fit better but im having trouble deciding if the extra bed space to hang out would be better over the loss of room space to play. The diagrams im finding online are tough to visualize, however this mattress sizes animation was kindve helpful. Did you guys go with twin or full for your growing toddler?