Doubles in size after feeding
Reaches peak rise within 4 to 8 hours, depending on temperature and feeding ratio
Shows lots of bubbles throughout, not just on top
Has a domed top at peak, then starts to flatten or slightly recede
Passes the float test in water
Smells pleasantly tangy, fruity, or yeasty
Has a light, airy, spongy texture
Feels active and elastic when stirred
Consistently rises predictably after feedings for several days
Is used when it is at or near peak height, not long after collapsing