Please give me detailed instructions on each step.
Step 1: Create a brim template. Cut out two circles from the cardboard, one slightly larger than the other. The smaller circle should be about 4 inches in diameter and the larger one should measure around 8 inches in diameter. 

Step 2: Cut out your felt pieces. Trace around your template onto the felt and cut it out with scissors or a craft knife. You will need to cut two of each size for the top and bottom of the hat, as well as four strips that are 3-4 inches wide for creating the sides of the hat. 

Step 3: Sew together your felt pieces. Pin or clip all four pieces together so they don’t move while you sew them together with a sewing machine or by hand using thread and needle. Make sure to leave an opening at one end so you can turn it right side out when finished. 

Step 4: Add interfacing (optional). If desired, add interfacing to give structure to your bowler hat before turning it right side out and shaping it with a steamer/hat blocking kit (see below). 

Step 5: Turn right side out and shape with steam/hat blocking kit (optional). Once all of your seams are sewn together, turn your bowler hat right side out through the opening left in Step 3 above. Use a steamer or plastic form from a hat blocking kit to shape your bowler hat into its final shape before finishing off any edges that may need trimming down or securing shut with stitches if necessary.
What kind of tools and materials do you need to make a bowler hat at home? To start your amateur milliner project of creating a bowler hat at home, I recommend:
* Felt in the color of your choice, preferably 2mm thick.
* A sewing machine or thread and a needle if you plan on sewing by hand.
* Pins or clips to hold the pieces together while working with them.
* Cardboard for creating the brim template.
* Scissors or a craft knife to cut out the material.

Optional but recommended:
* Interfacing to add structure to the felt.
* Hat blocking kit (steamer and plastic form) to shape the brim.

If, however, you are unable to secure the specialized equipment required, consider purchasing a good quality reproduction from an established milliner.

Do you want instructions on how to go about doing this?