0.4 - 0.5 nm^2
||Skotland T, Sandvig K, Llorente A. Lipids in exosomes: Current knowledge and the way forward. Prog Lipid Res. 2017 Apr66 :30-41. doi: 10.1016/j.plipres.2017.03.001 p.38 left column 5th paragraphPubMed ID28342835
|| Niemelä PS et al., Assessing the nature of lipid raft membranes. PLoS Comput Biol. 2007 Feb 23 3(2):e34. DOI: 10.1371/journal.pcbi.0030034PubMed ID17319738
||Primary source abstract: "In this work, [investigators] employ extensive atom-scale simulations to elucidate the properties of ternary raft mixtures with CHOL [cholesterol], palmitoylsphingomyelin (PSM), and palmitoyloleoylphosphatidylcholine."
||P.38 left column 5th paragraph: " It can be calculated that a lipid bilayer with a diameter of 70 nm contains approximately 60,000 lipid molecules, based on the assumption that each lipid molecule in average occupies 0.4–0.5 nm^2 of the surface area [primary source]."