You can use this query here to find your data for any specified indexed view:
SELECT v.NAME AS ViewName, i.name AS IndexName, p.rows AS RowCounts, SUM(a.total_pages) * 8 AS TotalSpaceKB, SUM(a.used_pages) * 8 AS UsedSpaceKB, SUM(a.data_pages) * 8 AS DataSpaceKB FROM sys.views v INNER JOIN sys.indexes i ON v.OBJECT_ID = i.object_id INNER JOIN sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id INNER JOIN sys.allocation_units a ON p.partition_id = a.container_id WHERE v.Name = 'YourViewNameHere'
Gives a result similar to
ViewName IndexName RowCounts TotalSpaceKB UsedSpaceKB DataSpaceKB YourViewName IX_YourView 1771 592 552 536
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