90" x 90" Hot Tub Cover

90″ x 90″ Is a Large Standard Size

The 90″ x 90″ size fits larger 6-to-8 person spas. Common matches are listed in the manufacturer-verified section below, and note that many large spas people assume are 90″ actually measure 89″, 91″, or 100″, so the tape measure decides.

Always measure outside-to-outside on your spa shell. See our measurement guide.

Which hot tubs use a 90″ × 90″ cover?

According to the manufacturer’s current specifications, this model measures a true 90″ × 90″:

• Hydropool: Signature 779 Platinum

An 89″ × 89″ spa can also take this cover for a slightly roomier fit, see the 89″ × 89″ page for those models. The reverse is not true: never order a cover smaller than your shell.

Sizes above are the manufacturers’ current published footprints (rounded-feet labels like “7′ × 7′” are shown in inches). Model years vary and shells get redesigned, so before ordering: measure your shell outside-to-outside and check your corner radius against the option list, our measuring guide takes about 15 minutes. Not a match? Build a custom cover to your exact measurements and see your price instantly.

In Stock: 90″ x 90″ Configurations

• 90″ x 90″, 6″ corner radius, 5″ skirt, Black DuraTex, Black Vinyl, Charcoal Vinyl, or Chocolate Vinyl

If your 90″ x 90″ spa has a different corner radius, build a custom cover.

What’s Included

• Heavy-duty marine-grade vinyl or DuraTex exterior
• High-density EPS foam core
• Heat-sealed vapor barrier
• Double-stitched reinforced seams
• Four locking safety straps
• Reinforced lift handles
• Full perimeter skirt
• 3-year limited warranty

Why Bigger Covers Need Extra Attention

Larger covers like 90″ x 90″ carry more weight and stress at the hinge. Imperium’s reinforced seams and full perimeter skirt are designed to handle the additional load. If you’re in a heavy-snow region, consider the 6-to-4 inch taper for better snow shed (available as custom).