Median mean densities () of significant structures at different spatial scales in G11 as a function of the separation of the structures. The squares and diamonds show the densities assuming spherical and cylindric geometries, respectively. The red dotted line shows the prediction for Jeans’ instability. The blue dotted line shows the prediction for the self-gravitating cylinder, assuming the Larson’s velocity dispersion-size scaling (see text). The colored areas indicate the area within a factor of two of the predictions. The blue dashed line shows the prediction for the self-gravitating cylinder in the case of only thermal support. The error-bars on data points show the inter-quartile ranges. For visibility, they are only shown for the spherical geometry. The error-bar in the lower left corner indicates 50% systematic uncertainty.