For our set designs, we generally offer the smallest size 50cm in width. Some of the sign (simple lines) we can try to make it event smaller. But larger letters tend to look neater and cooler. For Neon Sign Customization, 50cm in width can work for 6 characters is the best we can provide. The best suggestion is to send your design in .JPEG/.PNG to hello@neonmama.com if you have any other questions on sizes.