The balloon we've chosen is a 500g sounding balloon.

Free Lift: 1700g

Payload: 1150g

Gross Lift: 3350g

Inflation Volume: 3.1m(cubic)

Inflation Diameter: 1.8m

Ascent Rate: 400m/min

Burst Altitude: 24.5km

Cost: $57

The stratospheric layer of the atmosphere is typically considered to be from 11km to 50km above sea level. Assuming the range calculations are correct, this should put our burst altitude almost half-way up through the stratosphere when it bursts.