Extra-Tall tables and bars are typically around 45-48 high. Therefore, the tall bar stools that match these tables are usually in the 32-34 range. Spectator height furniture is typically used in commercial settings such as bowling alleys, pool halls, restaurants, and home bars.
To protect the name of your company, your newly designed name, logo or a catchphrase, a trademark is probably what you need. To protect your latest painting, the next great American novel or even a brilliantly choreographed dance sequence, a copyright is probably the best route for you.
When you are creating your logo or image for your signature (in Photoshop, for example), you need to set the resolution to 300 dpi (normally for web applications it would be 72 dpi). You then set the size in inches or cm - for the actual display size - and let the program calculate the pixel size.