If you need to refer to a raglan sleeve in Welsh, you could use a descriptive phrase like:
* "Lleisiau cyfun" - This literally translates to "combined sleeves" and is a common way to describe raglan sleeves in Welsh.
* "Lleisiau sy'n cysylltu â'r ysgwydd" - This translates to "sleeves that connect to the shoulder," offering a more detailed description.
You could also use the English word "raglan" directly, as it is often understood in Welsh contexts.