As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Old China with a modern twist, take two.
Source Adam Charlts
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
Retro Circles Background 4 No Black
Source GDJ
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
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
One more sharp little tile for you. Subtle circles this time.
Source Blunia