Sprite sheet size

I would like to use a very big sprite sheet in my game (8192X8192 or even bigger if I’ll be able to create one).
What is the maximum sprite size that I can use if I know I’m only going to publish the game for web?

Mmm, if you want to support mobile device, the maximum sprite should not bigger than 2048*2048.

Please refer to this: http://www.williammalone.com/articles/html5-javascript-ios-maximum-image-size/