Creating wireframes in the beginning of any design process can help creating an output without any surprises.

Sneakpeekit is a website providing high-quality PDF sketch sheets for web designers.

Web Design Sketch Sheets

The sheets are compatible with the most popular grid systems like Less Framework 4, 978 grid system, 1140 css grid, The Semantic grid system, Bootstrap from Twitter, etc.

And, they are not only for the desktop browsers but there are versions for tablets and mobile as well.

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