The domain wall velocity of ion‐implanted garnet films is measured on expanding stripe domains observed—using a laser‐flash optical microscope, for wide drive field and temperature range. Comparison of measured and calculated velocities shows the insufficiency of present theories. A simple model is suggested for describing the saturation velocity phenomena in implanted garnet films. This model shows the wall structure distortion at the effective films surfaces to be approximated by a transient Bloch line zone. The average static azimuthal angle is assumed to be &psgr;¯0=&pgr;2&Lgr;0/Din good agreement with the experimentally obtained &psgr;¯0=11.8 &Lgr;0/D, whereDis the effective film thickness and &Lgr;0is the Bloch line width parameter. The calculated saturation velocities agree surprisingly well with the experimental results for wide thickness and temperature range.