So I've been mulling over the idea of a Maker's Bag since it came out. One of the things that held me back was the volume of 12.5 liters--half a liter less than the 13-liter Pilot, which to me feels more compact, and only half a liter larger than my DLBC, which I find too small for most uses. I looked at the measurements and realized that the width and height of the MB are a smidge bigger than that of the DLBC, but the depth is almost twice: 6.9" to the DLBC's 3.3". Shouldn't that mean that the volume of the MB is over twice the volume of the DLBC?

If you do the math on the DLBC you get 7.23 L. On a MB, you get 15.4. Then I started looking at the volumes and measurements of other bags I own and realized that the LCB has a posted volume of 11 liters but width x length x height gives you 9.5. Doing the math on a Pilot gives you 14.7, not 13. What gives? Have I been calculating volume wrong all these years? I remember reading somewhere that TB calculates volume by filling the bags with plastic balls or some such. Are the external and internal measurements really that different?

If you do the math on the DLBC you get 7.23 L. On a MB, you get 15.4. Then I started looking at the volumes and measurements of other bags I own and realized that the LCB has a posted volume of 11 liters but width x length x height gives you 9.5. Doing the math on a Pilot gives you 14.7, not 13. What gives? Have I been calculating volume wrong all these years? I remember reading somewhere that TB calculates volume by filling the bags with plastic balls or some such. Are the external and internal measurements really that different?

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