Bubble 82 in NGC 5068 convolved to lower spatial resolutions from left to right. Panel a: superbubble at the original resolution. Each physical resolution has been refit with a new bubble radius (dashed black circle). Values of refitted radius (including the bubble centre) shown on each subplot. The filled white circle at the lower left of each panel shows the beam. The text immediately to the right of the beam shows the physical and angular resolution of the beam. The white horizontal line illustrates physical scales of 100 pc.