Size of side deck in competitive play

[Size of side deck in competitive play]

 Okay, thanks for the help.

[Size of side deck in competitive play]

 Hello,

 

Could some friendly soul tell me, what is the preferred size of a side deck? I searched the forums for "side deck" but only found 3 posts about tournaments. 2 had a side deck of only 6 cards, one had 10. Is there an official ruling of this?

We are getting so many cards that are clearly side cards. For example chaos vs. high elves. After 1st match, high elves side Blessing of Isha javascript:void(0);/*1297604993552*/ or Courage of Aenarion javascript:void(0);/*1297605124099*/. 2nd match high elves win and chaos sides in Corruption of Purity javascript:void(0);/*1297605202395*/.