Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Seamless Light Background Texture.
Source V. Hartikainen
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Remixed from a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
A free pink background pattern.
Source V. Hartikainen