Abstract: Size-adjustable footwear includes a body in which first and second insoles are received, the insoles being nested together and one upon another with both extending to generally cover the length and width of the sole of the footwear body. A first insole has a re-entrant section for partially enclosing at least part of the periphery of the forefoot of a wearer and includes a first toe cap, and lateral and medial flanges integral with the first toe cap. The second upper insole includes a reentrantly shaped second toe cap and a heel cup in which a first longitudinal dimension, between the heel cup and the second toe cap, defines a first size, and a second longitudinal dimension, between the body heel and the first toe cap, defines a second size larger than the first size. A user may select footwear based on the smaller first size, and then remove the first and then the second insole to accommodate growth of the feet.