Plant Tray Clear Plastic Humidity Domes: Pack of 5 - Fits 10 Inch x 20 Inch Garden Germination Trays - Greenhouse Grow Covers 5 Pack - Clear Plastic Humidity Domes Base of Dome - Exact Dimensions: Length: 20.5 In. (522 mm) - Width: 10 1/8th In. (255 mm) - 2 Inches tall Clear Plastic - Durable - Reusable Great for seed starts, microgreens, herbs & more