1. Start by sketching out a few ideas of what you want the bag to look like. This will help you narrow down the design options so that you don’t get overwhelmed when it comes time to create your bag. Brainstorm different shapes, sizes, and colors that would work together to create something special. You may even want to consider looking at other bags for inspiration or just as a starting point for ideas.

2. Consider materials carefully when creating your bag’s shape as this will affect how durable it is over time, not to mention its appearance and price point. Leather and canvas are popular choices but depending on the desired effect, other materials such as faux fur or velvet could also work well with certain designs.

3. Pay attention to details when crafting your unique shape – things such as handles, straps, buckles, pockets, etc. should all be taken into consideration when designing the overall look of the bag to ensure everything works harmoniously together aesthetically speaking.

4. Make sure each part of the design fits properly there should be no gaps between pieces which could cause uncomfortable rubbing while carrying or wear down quickly due to heavy use over time; if any parts need adjusting make sure they fit snugly before securing them in place permanently using glue or stitching securely together where necessary.

5. Finish off by adding any final touches such as rivets or decorative accents these can bring out the uniqueness of the design which helps set it apart from others on market shelves!