A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
A light gray wall or floor (you decide) of concrete.
Source Atle Mo