> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://swegmark.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What are sister sizes and how do I use them?

Sister sizes have the same cup volume but a different band size, for example 75C and 80B. If the cup feels right but the band feels wrong, it can be worth trying a size up or down in the band while adjusting the cup one step in the other direction. Read more in the [Sister Size Guide.](https://www.swegmark.com/g/your-label-size-isn-t-the-whole-story)