I love that these fit my 4” square nursery pots with plenty of room for catching any drainage or soil crumbs. The plastic isn’t super thin like a lot of clear plastic drip trays. It’s also not the thickest, but, they’re thick enough plastic to hold up so far and they are unlikely to crack randomly. These are significantly thicker than the clear plastic plant trays that are so thin they crinkle. These are neither heavy duty nor light duty; medium duty is the best description for durability I can come up with. Should be great for use with house plants, which is what I’m using them for, so, that means I have no idea what UV rays from the sun do to the plastic; all my plants live indoors under artificial light and window light and I haven’t had these long enough for UV-related yellowing or cracking to occur, so I can’t really speak for their use outdoors. I’ve had zero leaks so far, so, so far so good. I’m pleased with what I got.Edited to add updates on leaks: still zero leaks or cracks or holes; they’re holding up. And photos of the trays with 4” square nursery pots. They are reasonably deep and wide enough to accommodate a little more than 4” square pots. The shelf they are on is 6”x16”, for scale. Three of these take up almost the entire 6”x16” shelf, with a little bit of extra wiggle room.
