This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
Abstract Tiled Background Extended 12
Source GDJ
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
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
Black brick wall pattern. Brick your site up!
Source Alex Parker
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin