If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
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
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Classic vertical lines, in all its subtlety.
Source Cody L
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
The image depicts a tiled seamless pattern.The tile represents four leaves aligned every 90 ° , which may look like a bird or a dragon .The original leaf design is from a Japanese old book.
Source Yamachem
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin