Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
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
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Seamless Olive Green Web Background Image
Source V. Hartikainen
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Prismatic Abstract Line Art Pattern Background
Source GDJ