Here are some beautiful CSS ribbons examples with HTML and CSS.
CSS3 ribbons
Dev: Elena Nazarova
Corner Ribbons
Dev: Miro Karilahti
CSS Ribbon
Dev: CSS-Tricks
Sale label
Dev: @BrawadaCom
CSS Animated Ribbon
Dev: Josh Bader
CSS Animated Ribbon
Dev: John Graham
CSS Clip path animation
Dev: mario s maselli
The glow ribbon
Dev: Manabjyoti Sarma
Boredom
Dev: Schmuh
CSS Ribbon Product Badges
Dev: Taylor Jones
CSS Only Ribbon
Dev: Chris Harris
END by Catt
Dev: Katy DeCorah
CSS clip-path Ribbons
Dev: crayon-code
Ribbon Menu
Dev: Takane Ichinose
CSS Grid Ribbon layout
Dev: Andy Barefoot
Flat Banner Single Pseudo Element
Dev: Bryce Snyder
Google Books Ribbon Single element
Dev: Andy Willekens
Ribbon Badge in Pure CSS.
Dev: nikhil
Ribbon Wrapped Around Ellipse
Dev: Melanie
Ribbon Design
Dev: Aysha Anggraini
Pure CSS3 Overlay Ribbon
Dev: Mauritius D’Silva
Web page ribbon design
Dev: Zach Saucier
CSS Ribbon
Dev: charlie hield
Mail gradient ribbon
Dev: Nikolay_nmsk
PURE CSS3 RIBBON
Dev: alberto tafoya
CSS ribbon
Dev: web-tiki
Ribbon Article
Dev: Tim D
CSS Ribbon
Dev: Simon Coudeville
Flat icon
Dev: Katy DeCorah
CSS Ribbon
Dev: Jorge Maiden
CSS Ribbon
Dev: Kevin
Olive ribbon
Dev: Luca
Easter Eggs
Dev: Nicole Sentis
Apple Dev Login
Dev: Christophe Molina B
Oooh, ribbony
Dev: Emily Spence Place
Only CSS zig-zag ribbon
Dev: nikhil
CSS3 Ribbon
Dev: Bennett Feely
Single Div Ribbon
Dev: Bryce Snyder
Pure CSS USA Today Style Ribbon Module
Dev: Anthony Collurafici
CSS Ribbon
Dev: Oleg
Pseudo Element Banner
Dev: wesruv