A family of Microsoft relational database management systems designed for ease of use.
I think we've addressed your original post by giving you a robust model as a basis for your application. The form I included is a very basic interface, for inserting inventory data, but would be better implemented as a continuous subform within a products form, which would also include subforms for suppliers, colours and sizes. I'll try and amend it and post back when I've done so.
You will need to add a form for inserting supplier data, and at present the model does not cater for events at all. You'll find a ready source of support here as you develop the application. However, I think you would be well advised to first invest some time in learning the basics of application development in Access.