Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
From an image on opengameart.org shared by rubberduck.
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
A white version of the very popular linen pattern.
Source Ant Ekşiler
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A free seamless background pattern for use on websites.
Source V. Hartikainen
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
More in the paper realm, this time with fibers.
Source Jorge Fuentes
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
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