As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
You know you love wood patterns, so here’s one more.
Source Richard Tabor
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
Prismatic Floral Background No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Prismatic Curved Diamond Pattern No Background
Source GDJ
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Colorful Floral Background No Black
Source GDJ
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Prismatic Abstract Background Design No Black
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ