Dimensions of Large Stupas:

Abhayagiri (100 BC) - Height = 245 ft; Circumference = 1,021 ft; Diameter = 325 ft
Jethavana Vihara (275 AD) - Height = 232 ft; Circumference = 974 ft; Diameter = 310 ft
Ruwanvali Saaya (150 BC) - Height =198 ft; Circumference = 929 ft; Diameter = 296 ft
Dhamila Maha Saaya (1,200 AD) (unfinished) - Circumference = 1,950 ft

Lohapasada (Lowa Maha Paaya) (150 BC) – Nine story building of King Dutugamunu
Dimensions = 232 ft x 232 ft (1,600 stone columns still remains)

Dimensions of Ancient Reservoirs:

Panda Wewa (World’s First Reservoir) – (450 BC) (King Panduwas Dev)
Water surface area – 1,360 acres
Height and length of embankment – 22 ft and 8,400 ft

Abhaya Wewa – (400 BC) (King Pandukabhaya)
Water surface area – 360 acres
Height and length of embankment – 22 ft and 5,910 ft

Tissa Wewa – (300 BC) (King Devanam Piya Tissa)
Water surface area – 460 acres

Nuwara wewa – (100 BC) (King Walagambahu)
Water surface area – 3,180 acres

Minneriya Wewa– (250 AD) (King Mahasen)
Water surface area – 4,670 acres
Circumference – 21 miles
Embankment – 50 ft high with a length of 6,200 ft

Padawiya – (250 AD) (King Mahasen)
Embankment – 70 ft high with a base of 180 ft and a length of 11 miles

Mahadaragala Wewa– (250 AD) (King Mahasen)
Water surface area – 2,015 acres
Embankment – 36 ft high 5,550 ft long

Kala Wewa – (450 AD) (King Dhathusena)
Water surface area – 10 sq. miles
Circumference – 40 miles
Embankment – 60 to 80 ft high with a base of 200 ft and a length of 3 miles