you can also measure the trigger guard screw holes, from the center of the holes measure.a small ring mauser measures: 7 5/8" or 7.625
a large ring mauser measures: 7 7/8" or 7.830
large ring mausers:98,48,vz24,vz22,turks &comm mausers
small ring mausers:93,94,95,96 & mexican
m48:large ring,But with an intermediate action.
turks:most are threaded for the small ring barrel but have the standard length
(long) action of a large ring mauser 98. FROM:MAUSER CENTRAL