8 by 8 pixels, and just what the title says.
Source pixilated
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It looks very nice I think.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Prismatic Abstract Geometric Background 5
Source GDJ
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
A seamless texture of a rough concrete surface.
Source V. Hartikainen
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ