
- Cover size
- 21 x 45 ft
- Pool size
- 16 x 38 ft
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A 16 x 38 ft inground pool takes a 21 x 45 ft cover. The extra is the overlap, 2.5 ft on every side, and it laps onto the deck where the water tubes hold it down. Every cover on this page is listed by the pool it fits, and the covers cut for a larger pool that still work here are under Also fits.


These are cut for a larger pool but still work here. Each card shows the overlap it leaves on the sides and on the ends, so you can check it against your deck.













A 21 x 45 ft cover. It is sold as a 16 x 38/40, one cut that serves both pools, so on a 16 x 38 ft pool it leaves 2.5 ft of overlap on the sides and 3.5 ft on the ends.
One cover is cut for both pools. A 21 x 45 ft cover is the plus 5 ft size for a 16 x 40 ft pool, and on a 16 x 38 ft pool it simply leaves an extra foot at each end. Both sizes land on the same covers.
The 21 x 45 ft cover measures 132 ft around, so 17 tubes of 8 ft, or 14 of 10 ft. Lay them end to end on the overhang, out on the deck, not on the water.
A 23 x 45 ft cover leaves 3.5 ft on every side and end. A 25 x 45 ft leaves 4.5 ft on the sides and 3.5 ft on the ends, and a 26 x 46 ft leaves 5 ft and 4 ft. All of them stay inside the 2.5 to 5 ft rule and are listed under Also fits.
Set each tube on the cover first, then fill it two thirds to three quarters, with the cap facing up. Never fill one completely: the water expands as it freezes and splits the bag.