Based on the measurements of the domain structure only (domain period, p, thickness, h, bubble collapse field, H col , and field at which bubbles run-out, H el , ) a graphical method to determine the intrinsic length, l, and the saturation magnetization, 4 πM s , of magnetic bubble garnet films is described. The films of (YYbEuGdFe), (YLaTmGaFe) and (EuErFeGa) garnets are grown by the liquid-phase epitaxy technique (LPE) which consists of dipping a non-magnetic Gd 3Ga 5O 12 garnet substrate into an isothermal supersaturate solution of the component garnet oxides in a PbO-B 2O 3 solvent. Typical growth temperatures are ∼950°C and growth rates are ∼1 μm/min.