As done with guns I want to know how to to resize one model thats big and resize it to be smaller
I am unsure if this is possible. There may be a plugin for this, though.
Basically, you have to download the model resizer plugin. Here's the link. All you have to do is go to studio>plugins>manage plugins>Find Plugins> Paste in this link and you can install. You have to be in studio first. This plugin works very well. Just don't go too small!
http://www.roblox.com/Model-Resize-Plugin-2-1-DRAG-TO-RESIZE-item?id=143613186
Sadly, this is not possible in default roblox, but is possible with a plugin.
1. Go to Link in roblox studio
2. Install Plugin
3. Restart Studio
4. Open game and use plugin
5. Enjoy :D
http://www.roblox.com/Model-Resize-Plugin-2-1-DRAG-TO-RESIZE-item?id=143613186
Hope this helps