A 10 gallon aquarium tank typically measures about 20 inches long, 10 inches wide, and 12 inches high. This size is considered a small tank and is common for beginner aquarists

. In terms of weight, a filled 10 gallon tank weighs approximately 111 pounds, including water and gravel, so a sturdy stand is necessary to support it

. The dimensions can vary slightly depending on the manufacturer and glass thickness, but the standard size is close to 20" L x 10" W x 12" H