Pilates and Pregnancy
What changes each trimester, which positions to set aside, and how to keep practising safely.
Read → 11 min readUpdated September 2026 · 8 min read
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Firmness is the specification that matters most here, and it is the one most listings are vaguest about. A bolster exists to hold a body part at a fixed height while the muscles around it release — so a soft one, which compresses within seconds of load, has stopped being a bolster and become a cushion. These five cover the shapes worth owning, from an everyday rectangular default to a two-piece set and a round option for chest-opening work.

Quick Picks — At a Glance
5 Bolsters · Ranked
Gaiam is one of the more established names in yoga and Pilates props, which makes this the safe default if you want a single rectangular bolster that covers restorative work, supported stretching and side-lying positions without any guesswork. It's sold and shipped by Amazon.com directly, which simplifies returns if the firmness or footprint isn't right for your frame. As a general-purpose rectangular bolster, it does the core job any bolster is bought for: holding a body part at a fixed height so the surrounding muscles can release during restorative and supported Pilates work — which is why it's the pick to start with if you're buying your first one.
Shop on AmazonTokSay markets this bolster specifically for restorative and yin yoga and meditation, which matches how most Pilates practitioners actually use a bolster outside of class — for supported floor work and breath-led cool-downs rather than active exercise. At $35.99 it undercuts the Gaiam by a few dollars while covering the same core use case, making it a sensible pick for anyone building a home restorative setup without paying for a bigger-name brand.
Shop on AmazonThis is the only set on this list, pairing a rectangular bolster with a cylinder in a single $30.99 purchase — effectively giving you both of the two most useful bolster shapes (flat-topped for knees, ribs and spinal support; round for chest-opening and supported backbend work) at a price where either shape alone would usually be a compromise. The washable velvet cover is worth calling out on its own: plenty of budget bolsters only advertise a removable cover, not a machine-washable one, and washability matters more on a prop you rest directly against.
Shop on AmazonThe round shape is the better choice specifically for supported backbends and thoracic opening — placed lengthwise under the spine, its curved profile lets the ribcage fall open on both sides in a way a flat rectangular bolster can't replicate. Hihealer positions this one as a meditation cushion as much as a yoga prop, which fits: seated use for breathwork and cross-legged sitting is where a round bolster earns its keep once it's braced against something so it can't roll. At $41.99 it's the most expensive product here, so it's worth buying specifically for the round profile rather than as a general first bolster.
Shop on AmazonMABOZOO's rectangular bolster ties the JZHLLA set for the lowest price here, and it's the one built with portability in mind — a carry handle is a genuinely useful feature if you're moving a bolster between rooms, to a studio, or onto a mat set up somewhere other than a dedicated practice space. If your budget stretches to only one bolster and you want the standard rectangular shape rather than a two-piece set or a round profile, this is the straightforward entry-level option.
Shop on AmazonDo you need a bolster for Pilates?
Not for the classical repertoire, which uses no props at all. A bolster becomes genuinely useful in three situations: pregnancy and postnatal work, where side-lying support makes the difference between a sustainable session and an abandoned one; restorative and breath-led practice, where the body needs to be held in position long enough to release; and any presentation where a supported position is the only comfortable starting point, such as acute back pain. Outside those, a bolster is a comfort rather than a requirement.
What is the difference between a bolster and a foam roller?
They have opposite purposes despite the similar shape. A foam roller is hard and designed to apply concentrated pressure into tissue — you move on it, and some discomfort is part of the point. A bolster is soft-firm and designed to hold a body part still at a set height so the surrounding muscles can let go — you rest on it, and any discomfort means it is the wrong prop or the wrong position. Neither substitutes for the other: rolling on a bolster achieves nothing, and resting on a roller for several minutes is unpleasant.
What size bolster should I buy?
The standard rectangular size of roughly 25 by 12 by 6 inches suits most adults and most uses. Height is the dimension worth thinking about: 6 inches is the versatile default, while 9-inch round bolsters give more lift for supported backbends and under-knee support and can be too much for smaller frames. Anyone under about 5'2" often finds a standard bolster lifts them uncomfortably high in supine work and is better served by a lower-profile or pranayama bolster.
What fill is best in a bolster?
Densely packed cotton batting is the best general-purpose fill — firm, resilient, and it holds loft for years. Buckwheat hulls are firmer still and moulding, which suits heavier users and anyone who keeps bottoming out other bolsters, at the cost of considerable weight. Polyester or foam-chip fill is the budget option and the one to be wary of, because it compresses permanently rather than recovering, so a bolster that felt supportive on arrival can be noticeably flatter within a year.
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