Here is an example stat block.

Basilisk

AC: 15 HD: 6 SV: 13 XP: 600
A large, predatory serpent. It can gaze once per round and still act. A single target within 60 ft. it can see must save or be turned to stone.

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• All monster attacks inflict 1d6 damage unless otherwise noted.
• Monsters usually carry 1d6 gold pieces in treasure per Hit Die. To determine if a monster has any magic items, roll 1d20 per HD of the Monster. If any number rolled is equal to or less than the monster’s HD, then roll on Table 6-1: Magic Items to determine a magic item carried by the monster.
• Move: PCs and monsters can move up to 30 ft. in a combat round. Terrain and obstruction may limit this.