Here we propose to look at the structure of two phosphocholine lipids, and their larger scale structures in aqueous solution. Depending on the length of the fatty acid chain in a phopholipid molecule, different aggregates are formed, ranging from small spherical micelles to larger lamellar membrane bi-layers. We have chosen two small phosphocholine lipids, one with a 7-carbon and one with a 6-carbon fatty acid chain, where the latter forms spherical micelles while the former rod-shaped micelles, to investigate by neutron diffraction on NIMROD. Understanding the atomic level hydration concomitantly with the aggregated micellular structure in these systems has important implications in for a variety of practical applications such as membrane transport of drugs and drug delivery.