Bubble Letter Alphabet STL – 77 Puffy 3D Wall Letters, A-Z, 0-9 & Symbols

Overview

Spell anything with a complete puffy bubble letter alphabet built for big, soft, squishy-looking wall signs. Perfect for kids room name signs, nursery decor, playroom walls, party backdrops, booth signage and photo props. Print in any colors you like — a pastel rainbow mix looks incredible on a plain wall.

At 100mm cap height these are statement-size letters, and the full character set means you are never missing a letter mid-name: A-Z uppercase, a-z lowercase, 0-9 and 15 symbols including a star and a heart.

Every character has a flat back and prints back-down with no supports — clean first layer, fast print, easy to batch a whole name on one plate. Mount with a Command strip or a dab of hot glue.

What's Included (77 STL Files)

• 26 uppercase letters (A-Z)
• 26 lowercase letters (a-z)
• 10 numbers (0-9)
• 15 symbols: % # - + & . ! ? ' ~ arrow, star, heart, dollar sign, at sign

3D Model Dimensions

• Cap height: 100mm (3.9in) for uppercase, numbers and symbols
• Thickness: 16mm (0.6in)
• Lowercase letters are scaled to sit correctly with the uppercase, so round x-height letters (a, c, e, o) are shorter than 100mm by design; letters with ascenders or descenders run taller
• Width varies by character — up to roughly 130mm (5.1in) on a W or M

Suggested Printer Settings

• Layer Height: 0.2mm
• Top/Bottom Layers: 4
• Walls: 3 or 4
• Seam: Nearest
• Infill: 10%-15% Gyroid or Grid pattern
• No supports needed — prints flat back down
• Temperature settings depend on your filament and printer

Tips

• Prints flat and is quick to batch
• Mount with a Command strip on the flat back
• Coat in clear resin for a smooth, glossy finish