Why 30-40 pieces? That is a number from which numerous outfits for a season can be derived. As a rule, nothing more is needed. It's not about numbers, however. If you're happier with a few more or less pieces, then be free!
1. Create the basis.
Empty the wardrobe and assign each item to one of the following categories: Donate, give away or sell any items of clothing that are not liked / worn. Keep mediocre clothing out of sight and discard after three months if not missing. Keep favorite items from another season in a box until this season. Favorite pieces of the current season come back in the closet. This is the basis for your capsule wardrobe.
Think about which colors suit you, what do you like the most. There should be a maximum of 4 basic colors in your wardrobe in order to be able to combine all parts well with each other. Make sure that patterns can also be easily combined with one another.
Use the 3 model as a guide. For example, choose three tops: a basic top, a statement top and one that looks exactly between the two. Do this for all clothing items. Depending on your lifestyle, you can then decide whether you want to add a basic piece here and there or something more original. Combine several outfits and use each piece once if possible. Make a note of what is still missing.
Shoes and accessories can turn any simple basic outfit into something very special. You can also reverse the impression of an outfit. An elegant dress becomes hip and trendy with a rough shoe. Feel free to try it out and experience the effect you can produce with your combinations.
A capsule wardrobe saves time and energy when choosing clothes every morning. It trains concentration on the essentials - also in other areas of life. Conscious consumption of clothing leaves more money for hobbies and other things. Fewer parts in the cabinet are an expression of modern sustainability, as resources are conserved. The personal style becomes visible through the reduction to favorite pieces.