lagel size of the cabezon fish

What is the legal size of the cabezon fish and what is the limit per day?

29 3/4" and you can keep 17.

Seriously.. asking the forum for regulations probably isn't the best idea.

It seems you're from Washington, I would check here...
http://wdfw.wa.gov/publications/01818/wdfw01818.pdf

If you find yourself away from your computer and need clarification, try the WDFW hotline.

WDFW Fishing Hotline:
(360) 902-2500
Press 2 for recreational rules

Extension 1: Marine Areas 1-4, Washington coastal rivers and tributaries, lakes, and razor clam openings.
Extension 2: Marine Area 1, Columbia and Snake rivers, Eastern Washington rivers, tributaries and lakes.
Extension 3: Marine Areas 5-13, Puget Sound including the Strait of Juan de Fuca.
Extension 4: Puget Sound rivers, tributaries and lakes.