Part number 60592 and 35315. Size 1x2x2.
Lego 60592 Window Frame with/without Glass 1x2x2 Select Set Pack of 10 or 20.
Lego 2493 4347 Window Frame 1x4x5 with Glass Select set Pack of 5 or 6.
LEGO® 2x60596 Door Window Frame 1x4x6 White 4541956 (GB) Creator
Lego 60593 60602 Window Frame 1x2x3 Select Colour Pack of 1
The Lego Serious Play Window Exploration Bag
Lego 60032 2377 Window Frame 1x2x2 Select Colour Pack of 6 Brand New
