My littlest Wood frog (Baby Jr.) hasn't grown much since I caught him/her back in August of this year. The frog still remains roughly .5 inches in length STV (the frog probably hasn’t hit its growth spurt yet lol). Some Wood frogs mature and grow faster than others. It can take anywhere from a year to 2 years for a juvenile to reach its full size of adulthood.
Here are some pictures I took recently of my Baby Jr. I have him near a penny and my Whites tree frog, Hubbie Mcgrubber –pronounce hue-bee mick-groo-ber—, to give you an idea of his diminutive size. He/she is pretty healthy and is one of the most feisty frogs I've seen when comes to eating ;D.