From Riehn
(from p 87)
Of all the troops listed in App VI, only the Guard, the cuirrassiers,
16 inf div, 6 cav div, 36 cossack regt, and the artillery attached
to these formations were available for the defense of the western
frontier.

The Russian Army, June 1812
Inf
  6 Guard regts
  1 Guard battalion
  164 inf regts
    14 grenadier regts
    96 musketeer regts
    50 jaeger regts
    4 marine regts

The inf was organized into 1 Guard and 27 inf regts.
1st and 2nd inf Div each had 6 grenadier regts
Other divs: 2 jaeger, 4 musketeer regts
23rd Div: 1 jaeger, 3 musketeer regts
25th Div: 1 musketeer, 1 jaeger regt, 3 marine regts

Cav
  6 Guard regts
    2 cuirassier regts
    1 dragoon regt
    1 hussar regt
    1 uhlan regt
    1 cossack regts
  60 line regts
    8 cuirrassier regt
    36 draoon regt
    11 hussar regt
    5 uhlan regt

 all cuirrassier were massed in 2 div.  1st Cuir Div included both guard
 regts

remaining cav was organized into 1 Guard and 8 cav div
typical div: 4 dragoon, 2 hussar or uhlan

Art (each bat has 12 guns)
  Guard 4 foot, 2 horse batt
  27 * 3 foot batt