There are many carbon patterns, but this one is tiny.
Source Designova
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
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
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
Heavily remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ