We usually recommend between 10-15 minutes per episode. We have seen that the attention span of a listener starts to decline post this period. But, the duration completely depends on the nature of the podcast. Interview podcasts can go up to 30- 45 minutes long, while some go up to even 2 hours. Understanding your content and knowing your listeners will help you find that sweet spot.
To start off with, you can record a 5-7 minutes audio clip for your 'Introduction episode'. This is where you introduce yourself and your podcast to your first-time listeners.
Click here to start creating your podcast: Hubhopper Studio