At first glance, Glazelite Planters look like substantial glazed ceramic pots. But with a resin, fiberglass & stone mixture, they are shockingly lightweight. Did we mention they are also frost resistant & UV protected? Perfectly safe for outdoor use. And that finish! The stone mixture, resin and fiberglass construction of these pots give a sturdy product that is surprisingly easy to handle and gives the look of ceramics. Set of three varying sizes included: 19.5 x 19.5 x 16.5; 17.25 x 17.25 x 15; and 14.25 x 14.25 x 11.75 in. Indoor-Outdoor use. Ensure drainage to avoid cracks or damage. Protect from hard freeze.