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
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
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
The image depicts polka dot seamless pattern.
Source Yamachem