A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
White circles connecting on a light gray background.
Source Mark Collins
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Retro Circles Background 7 No Black
Source GDJ