A fully customizable US paper mockup can be used for letterhead and flyer. Change background, color of the paper curl, lighting and shades of the paper curl and there are different light and shadow variations either coated or uncoated paper to be used so unhide and get some cool curl and paper effects.

Free-US-Paper-Letterhead---Flyer-Mockup-PSD

Free-US-Paper-Letterhead---Flyer-Mockup-PSD-File

Description:

Available Format: Layered PSD easy smart object insertion
License: Free for personal and commercial use
Zip File Includes: Photoshop PSD File
Mockup Resolution: 1700 x 1700 px approx
Artwork Resolution: 8.5 x 11 Inches

Instructions:
1. Place letterhead design, poster or flyer design on smart layer
2. Easily change your background color or place custom background if required
3. Photoshop requirement: Adobe Photoshop CS5+

Free Flyer Mockup