This is so subtle you need to bring your magnifier!
Source Carlos Valdez
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
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
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Colorful Floral Background No Black
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin