As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Tile-able Dark Brown Wood Background. Feel free to use it as a background image in your designs or somewhere on the web. By the way, the color seems to be close to Coffee Brown.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Abstract Tiled Background Extended 12
Source GDJ
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Sharp but soft triangles in light shades of gray.
Source Pixeden
Prismatic Geometric Pattern Background
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
The image depicts a seamless pattern which was made using stripe-like things including borders.I used OCAL cliparts called "Blue Greek Key With Lines Border" uploaded by "GR8DAN" and "daisy border" uploaded by "johnny_automatic".Thanks.
Source Yamachem
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Prismatic Rounded Squares Grid 4 No Background
Source GDJ