A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Oh yes, it happened! A pattern in full color.
Source Atle Mo
There are many carbon patterns, but this one is tiny.
Source Designova
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media