Samples were placed directly into quartz glass capillary tubes (0.01 mm wall thickness, 1.5 mm outer diameter) for measurement in the Diamond Light Source (Harwell Campus, Oxford, UK) I22 beamline at 17 keV with a sample to detector length of 6.7 m. Scattering profiles were radially averaged and the capillary scattering as well as the background buffer profile was subtracted upon acquisition using the Diamond Light Source software, DAWN. The q-calibrant was silver behenate. The vesicle scattering profiles were fitted using an in-house code running on MatLAB, which can be obtained by contacting the corresponding author.