Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Hexagonalism Pattern No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
It looks very nice I think.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
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
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten