8 by 8 pixels, and just what the title says.
Source pixilated
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
One more sharp little tile for you. Subtle circles this time.
Source Blunia
To get the tile this is based on, select the rectangle in Inkscape and use 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
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
A new one called white wall, not by me this time.
Source Yuji Honzawa
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A browner version of the original weathered fence texture.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous