20-22cm Pilates Ball Basics: Inflate, Use and Care

By MoveActive USA | Grip Socks & Accessories for Pilates, Yoga | Published: 2026-11-02

Category: Tips & Care

Learn how to inflate a Pilates ball to the right firmness, use a 20cm Pilates ball for core work, and keep it clean and grippy with simple care steps.

Quick answer

Inflate your 20-22cm Pilates ball to about 80-90% of its maximum size so it feels firm but still gives slightly under your thumb, then check it before every session and wipe it down after use.

Why the 20cm size works for core and posture work

A 20cm Pilates ball size is small enough to place between your knees, under your lower back, or between your hands without taking over the movement. That makes it useful for a mini Pilates ball for core drills where you need feedback on whether you are gripping or bracing evenly.

The trade-off is that a smaller ball gives less support than a large stability ball, so it suits targeted work rather than sitting or full-body balance training. If you are new to props, start with the ball fully deflated and add air in small amounts until you can feel it resist without straining.

Firmness changes the exercise, not just the ball

A very firm ball makes balance work harder and can feel uncomfortable against the spine or inner thighs. A softer ball is more forgiving but may collapse too much during small pilates ball exercises such as knee squeezes or heel taps.

Aim for a middle setting: firm enough to hold its shape when you press it, soft enough that you can dent it with your thumb. Test it in the first exercise you plan to do, not just in your hands.

Steps to inflate, use and care for your ball

Inflate in stages: Insert the pump nozzle or straw and add air in short bursts, checking the ball after every few pumps. Stop when the ball feels firm but still gives slightly under your thumb. Overinflating is the most common mistake; a ball that feels rock-hard is more likely to split at the seam.
Check the size: Measure across the widest point. A 20-22cm ball should sit in that range when fully inflated; if it is noticeably smaller, it is underinflated for most exercises. Use a tape measure rather than guessing, especially if you plan to follow size-specific instructions.
Seal and test: Push the plug firmly into the valve and press the ball against a wall for a few seconds. If it loses air, reseat the plug before starting your workout. A slow leak during a set can throw off your balance and make the exercise feel harder than it should.
Place it for core work: For a mini Pilates ball for core exercises, start with the ball between your knees or under your lower back, depending on the move. Keep the ball lightly compressed rather than squeezed hard. If you feel the ball slipping, check your clothing and the ball surface before adding more air.
Clean after each session: Wipe the ball with a damp cloth and mild soap, then dry it fully before storing. Avoid harsh cleaners that can break down PVC over time. Store the ball away from direct sunlight and sharp objects to prevent cracks.
Recheck firmness regularly: PVC balls can soften slightly with use. Before each workout, press your thumb into the ball; if it dents easily, add a little air. Consistent firmness keeps your pilates ball care routine simple and your exercises predictable.

Product facts

20-22cm Pilates Ball - Navy Blue: Made from 100% PVC and sized at 20cm in diameter. PVC wipes clean easily, and the 20cm size fits between knees or under the lower back for targeted core work.
20-22cm Pilates Ball - Navy Blue