Manually
Enter numbers 1 to 4 in an unused column.
Select those 4 cells and right-click drag down as far as you wish.
Release and "copy cells"
Autofilter for number 4
Then F5>Special>Visible Cell Only>OK
Format>Row>Height........set a height.
Get rid of Autofilter. Delete unused column.
Or run a macro.
Sub rowht()
For i = 4 To Cells(Rows.Count, "a").End(xlUp).Row Step 4
Rows(i).RowHeight = 24
Next i
End Sub
Gord Dibben MS Excel MVP