const Double_t AliITSv11GeometrySDD::fgkWaferLength = 87.6 *fgkmm;
const Double_t AliITSv11GeometrySDD::fgkWaferThickSens = 299.8*fgkmu;
const Double_t AliITSv11GeometrySDD::fgkWaferWidthSens = 70.17*fgkmm;
-const Double_t AliITSv11GeometrySDD::fgkWaferLengthSens = 74.97*fgkmm;
+// 256 anodes times 294 microns of pitch
+const Double_t AliITSv11GeometrySDD::fgkWaferLengthSens = 256*294*fgkmicron;
const Double_t AliITSv11GeometrySDD::fgkDigitCablWidth = 18.4*fgkmm;
const Double_t AliITSv11GeometrySDD::fgkDigitCablAlThick = (30+30*8./10.)*fgkmicron; // will probably change