Penny Round Glass Tile Thinny-Pennies™ 20mm

1/2 pound of penny round recycled glass tiles 20mm x 4mm, approximately 70 pieces.



MORJO Thinny-Pennies are 20mm Penny Round Recycled Glass Tiles. They are sold loose by the 1/2 pound (approximately 70+ pieces), which covers slightly under 1/3 of a square foot (~42 square inches) with a standard grout gap of 1/16 inch. These tiles have a glossy finish, and the glass has solid color throughout (and not just on the tops or bottoms.) They are opaque when mounted on an opaque surface.

The Thinny Pennies are the same thickness as regular glass mosaic tile (4mm or ~1/8 inch) and not fat like glass gems. This makes them much easier to use with other types of glass tile and easier to grout.

The recycled glass is a homogeneous material that cuts cleanly and predictably using the Wheel-bladed Mosaic Glass Cutter. They are hard and durable and UV-resistant and can be used for the exteriors of commercial buildings. The fusing process for making these tiles from powdered recycled glass is referred to as “warm glass” or “enamel glass” or “pate de verre.”

Rough Bottoms for Improved Bonding

The bottoms of these tiles are left intentionally rough from gritty mold release (chalk) for improved bond strength. In my experience, and rough, scratched, or etched glass is more effective than embossed ridges. Rough bottoms also has another important advantage over embossed ridges: they don’t interfere with cutting.

Penny Round Glass Tile Thinny-Pennies 20mm

  • glass penny round tile
  • tile size: ~3/4 inch (20mm) diameter
  • thickness: 1/8 nominal (4mm)
  • sales unit: 1/2 pound loose tile (about 70+ pieces).
  • material: glass
  • variety: recycled glass
  • pigments: colorfast, UV resistant
  • durability: frost-proof, impervious to liquid
  • usage: suitable for indoor and outdoor use


Each 1/2-pound bag of about 70+ tiles covers just under 1/3 of a square foot (~42 square inches) assuming a standard grout gap of 1/16 inch.

Grout Gap?

Note that dry indoor mosaics do not have to be grouted (and thus you can simply mount the tiles tightly together), but outdoor and wet mosaics must have grout to prevent water from penetrating behind the tiles. The best way to ensure that the gaps between the tiles is to leave a 1/16-inch gap instead of pressing them tightly together, and this point seems counter-intuitive to some people. Consider this: you can never mount them so closely together that water can’t penetrate it, but you can accidentally put them so close that grout doesn’t get adequately pressed into the crack during the grouting process.


These tiles have a nominal thickness of 1/8 inch (4mm), which is the same nominal thickness as most of the glass tile we sell. You can use these with other brands of recycled glass and even vitreous glass, although the graininess of some vitreous colors might not look good when combined with the homogeneous glassiness of recycled glass tiles.

Cutting Recycled Glass Thinny-Pennies

Recycled glass cuts like butter using the Mosaic Glass Cutters without creating a lot slivers or cutting waste.

How To Make Mosaics

For more advice on designing your mosaic project or cutting and grouting tile, please see our Mosaic Frequently Asked Questions page or our How To Mosaic blog or our Mosaic Information Guide. ;
ImageNameUnit SizePriceBuy
Ultramarine Tint-1 penny round 20mm
Ultramarine Blue Tint1 Y113-20mm8 oz ~80 tiles (20mm)$4.10
Ultramarine Blue penny round 20mm
Ultramarine Blue Y74-20mm8 oz ~80 tiles (20mm)$4.10
Ultramarine Blue Dark Y75-20mm
Ultramarine Blue Dark Y75-20mm8 oz ~80 tiles (20mm)$4.10
Cyan Blue Tint-2 penny round 20mm
Cyan Blue Tint2 Y78-20mm8 oz ~80 tiles (20mm)$4.10
Cyan Blue Tint-1 penny round 20mm
Cyan Blue Tint1 Y81-20mm8 oz ~80 tiles (20mm)$4.10
Teal Tint-3 penny round 20mm
Teal Tint3 Y85-20mm8 oz ~80 tiles (20mm)$4.10
Teal Tint-2 penny round 20mm
Teal Tint2 Y87-20mm8 oz ~80 tiles (20mm)$4.10
Teal penny round 20mm
Teal Y88-20mm8 oz ~80 tiles (20mm)$4.10
Mint penny round 20mm
Mint Y119-20mm8 oz ~80 tiles (20mm)$4.10
Forest Green penny round 20mm
Forest Green Y96-20mm8 oz ~80 tiles (20mm)$4.10
Leaf Green Deep penny round 20mm
Leaf Green Deep Y118-20mm8 oz ~80 tiles (20mm)$4.10
Spring Pea Green penny round 20mm
Spring Pea Green Y92-20mm8 oz ~80 tiles (20mm)$4.10
Light Spring Green penny round 20mm
Light Spring Green Y91-20mm8 oz ~80 tiles (20mm)$4.10
Chartreuse penny round 20mm
Chartreuse Lemon Lime Y89-20mm8 oz ~80 tiles (20mm)$4.10
Yellow penny round 20mm
Yellow Y43-20mm8 oz ~80 tiles (20mm)$4.10
Butter penny round 20mm
Butter Y99-20mm8 oz ~80 tiles (20mm)$4.10
Golden-Cream penny round 20mm
Golden Cream Y36-20mm8 oz ~80 tiles (20mm)$4.10
Indian Yellow Deep penny round 20mm
Indian Yellow Deep Y44-20mm8 oz ~80 tiles (20mm)$4.10
Yellow-Orange penny round 20mm
Yellow Orange Y45-20mm8 oz ~80 tiles (20mm)$4.10
Red-Orange penny round 20mm
Red Orange Y48-20mm8 oz ~80 tiles (20mm)$4.10
Fiery-Orange penny round 20mm
Fiery Orange Y47-20mm8 oz ~80 tiles (20mm)$4.10
Sienna penny round 20mm
Sienna Y32-20mm8 oz ~80 tiles (20mm)$4.10
Burnt Umber penny round 20mm
Burnt Umber Y42-20mm8 oz ~80 tiles (20mm)$4.10
Purple penny round 20mm
Purple Y62-20mm8 oz ~80 tiles (20mm)$4.10
Lavender penny round 20mm
Lavender Y60-20mm8 oz ~80 tiles (20mm)$4.10
Lavender-Pink penny round 20mm
Lavender Pink Y57-20mm8 oz ~80 tiles (20mm)$4.10
White penny round 20mm
White Y01-20mm8 oz ~80 tiles (20mm)$4.10
Penny Round Glass Tile 20mm Thinny Pennies brand
Penny Round Glass Tile Thinny-Pennies™ 20mm

This product has multiple variants. The options may be chosen on the product page
20mm Thinny Pennies Glass Penny Rounds Sample Board
Sample Board Morjo™ Thinny-Pennies™ Round Recycled Glass Tiles 3/4 Inch$11.00