The self-organization hypothesis of the magnetopause Kelvin-Helmholtz (K-H) instability is tested against observations by two-dimensional (2-D) magnetohydrodynamic (MHD) simulations for two different initial seed perturbations. The linear relationships are obtained by the simulations between the period of the magnetopause oscillation caused by the K-H instability and the distance along the magnetopause from the subsolar point. The comparison of the linear relationships with that obtained from reported observations of the magnetopause oscillations gives a reasonable thickness of the velocity shear layer near the subsolar point of 1570km--3010km and a reasonable average magnetosheath flow speed along the magnetopause of 399km/sec--766km/sec. This suggests that the self-organization of the magnetopause K-H instability, i.e., the successive pairings of vortices, really occurs along the magnetopause. The present comparison provides a useful method to determine the thickness of the velocity shear layer near the subsolar point as an inverse problem. ¿ 1999 American Geophysical Union