L x W x D : 30.75' x 12.5' x 5.5' These trays are heavy duty for long use. The Good To Grow Trays fit perfectly into the Good To Grow Reservoirs. The hydroponic grow trays fit perfectly into the reservoir lip, so no stand is necessary. Just add a small water pump and a fill/drain kit to create a complete hyroponics system! Just search "˜Good To Grow"™ or hit the Manufacturer link below for all of General Hydropnics"™ Good To Grow reservoir and tray sizes.