Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Prismatic Abstract Background Design No Black
Source GDJ
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 criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin