yugioh extra deck zone YGO TCG One-Player Battle Mat (25" x 13") Monster Zone - Yugipedia

For modal double-faced cards in this set, these icons are a single triangle for the front face, and a double triangle for the back face

A Standard Smartphone Most modern smartphones are between 2.8 and 3.1 inches wide

The basic answer is WotC makes that decision each time a new set comes out

Colress's Experiment is, after all, one of the strongest cards in the standard format right now

25PP-JP018 Magistus Verethragna Zoroa (Zoroa, the Magistus Verethragna) [Zoroa, the Magistus Victorious Verethragna] Level 8 FIRE Spellcaster Fusion Effect Monster ATK 2900 DEF 2900 Materials: 1 Magistus monster + 1 Fusion, Synchro, Xyz, or Link Monster You can only use the (1)st and (2)nd effect of this cards name each once per turn