First of all, I am using translation software. I'm sorry if the context is wrong.
I'm using DataGrid Composite Columns, but the column width values are out of sync.
I am in trouble because the column width cannot be set normally.
Am I using it incorrectly?
If you make a mistake, please tell me how to use it.
We are not sure why column width is not working for you - not sure about the DataGrid header style however it seems that you are using a customized theme. Similar setup on our demo works normally: https://blazor.radzen.com/datagrid-composite-columns
Thank you for your reply.
I'm sorry the theme is changed with CSS.
However, the situation is the same if you do not change it.
I checked the demo again, but I think that the column width of the demo is different from the setting.
The Postal Code column is different from the value specified by Width.