You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
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 slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Redrawn based on a drawing in 'По Сѣверо-Западу Россіи' Konstantin Sluchevsky, 1897.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Prismatic Abstract Geometric Background 3
Source GDJ
There are many carbon patterns, but this one is tiny.
Source Designova
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Floral patterns will never go out of style, so enjoy this one.
Source Lasma