A new model for the H mode pedestal (edge) width is proposedbased on turbulence suppression by the combined effects of magnetic andE × B shear. The resultant scaling of the pedestal width includes the toroidalLarmor radius and the magnetic shear. A plasma current dependence of thewidth appears indirectly through the magnetic shear, and thus the dependencebecomes poloidal-Larmor-radius-like as observed on many machines. One ofthe features of this model is that an approximately linear machine sizedependence of the width appears through the spatial profiles of the safetyfactor and magnetic shear. A comparison of this model with Alcator C-Mod and JETdata shows that it can reproduce the data almost equally well or even betterthan a scaling based on the poloidal Larmor radius. The magnetic sheardependence of the pedestal width can explain the somewhat divergentcharacteristics observed in experiments. On the other hand, extrapolationbetween different machines or prediction to ITER by the model cannot bestraightforward due to different magnetic shear profiles. The method forpredicting the pedestal parameters in ITER is developed based on theprimitive assumption that the ITER shear profile relative to the existingmachine is identified, which predicts a pedestal temperature of 3-4 keV for the range of pedestal densities in the Q = 10 operation window.Experimental validation and the predictive capability of the model are stilllimited, and further data accumulation and examination, in particular, theprofile data of the magnetic shear from each machine, are indispensable tofurther improve the model.