Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A bit strange this one, but nice at the same time.
Source Diogo Silva
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Abstract Geometric Background 4
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin