A Practical Guide to Choosing Size When You're Not Sure
The cart has been open for 2 weeks. Four sizes, three shapes, and no idea whether the numbers mean anything.
A three-step way to narrow size in one sitting, how to read a listing in 90 seconds, and when more research really stops helping you.
The Short Answer
Narrow to a diameter range first, then a shape, then pick one. Do not compare across all three dimensions at once, because that produces the tab paralysis you already have. If you're truly unsure, 1.2 inches in diameter and 5 inches of insertable length is a reasonable first guess. A first purchase is a measurement, not a verdict.
Why the cart stalls
Picture this: it's 11 p.m., the cart is open, and you've read the same listing 3 times without learning anything new. Size shopping fails because the variables multiply. Four diameters times three shapes times two materials is 24 combinations, and most listings mix the dimensions in a paragraph so you can't compare them side by side.
The fix is sequential. Decide one dimension, eliminate everything that fails it, then decide the next. Each pass cuts the list roughly in half, and three passes leave you with 2 or 3 options, which is a decision a person can actually make.
The first time you try this, the list will feel shorter than you expected, which is the point. Write the eliminations down. A notes app is enough. The act of writing "too wide" next to a product stops you from reopening it at midnight.
Step one: the diameter range
Set a floor and a ceiling before you look at anything. For a first purchase, a floor of 1.0 inch and a ceiling of 1.4 inches covers most people comfortably.
Everything above 1.5 inches is a deliberate choice, not a default. It's fine to want it. It's not fine to arrive there because the listing looked more impressive.
If a product lists circumference, divide by 3.14 and write the diameter next to it. A 4.7 inch circumference is a 1.5 inch diameter, which is over your ceiling.
Step two: the shape
Shape is where most of the felt difference lives. A tapered tip is easier to start with. A rounded tip is more forgiving at odd angles. A curved shaft is useful for reach and awkward for storage.
For a first purchase, straight and slightly tapered is the safest combination. It's easier to clean, easier to store, and easier to figure out.
Skip anything with pronounced texture on a first order. Texture effectively increases diameter at the widest point, which means a 1.2 inch textured device can feel like a 1.4 inch smooth one.
Step three: pick the first one, not the last one
The mental error in a stalled cart is treating this as the final purchase. It isn't. It's the purchase that tells you what the second one should be.
That reframe lowers the stakes enough to check out. You're not committing to a preference forever. You're buying information for the price of one item.
So pick the option that's easiest to be wrong about: mid-range size, simple shape, easy return policy.
Reading a listing in 90 seconds
Look for four things and ignore the rest. Insertable length in inches. Diameter in inches, or circumference. Material, named specifically. And the noise rating at the lowest setting.
If any of those is missing, the listing is incomplete, and an incomplete listing is a reason to move on rather than a reason to email support. There are enough options that you don't have to solve a retailer's copywriting problem.
Photos lie about scale. A device photographed next to a hand tells you more than one on a white background, and neither tells you as much as a tape measure.
When to stop researching
Stop when two options differ only in color, or when you've read the same 3 reviews twice. At that point, additional information has stopped arriving and the delay is emotional, not analytical.
Set a deadline. If you haven't ordered by Sunday night, buy the smaller of the two. Smaller is easier to be wrong about, and it leaves room to size up later.
Where this method breaks
It breaks if you have a medical reason to be cautious about insertion, in which case a clinician's input matters more than any listing. It also breaks for gifts, since you can't calibrate someone else's preference from a product page, and a surprise in the wrong size is worse than a gift card. If you're shopping for someone else, skip the method and buy something small with a return window.
The honest limitation is that size charts describe geometry, not comfort. The only reliable measurement is your own experience, and that costs one purchase to obtain.
Stop Comparing, Start Measuring
If three passes left you with a shortlist and no decision, this covers the trial in one order.
- Self-Love Ritual (3-Piece): HOPSTAR, GODLIKE, and Velvet Touch in a single box, which suits an unresolved size question because the pieces vary in shape and you can space them across 3 sessions.
- Browse the Customer Favorites collection for options with published diameters.
- Related reading: choosing a size for a gift.
- Next in this series: three questions to answer first.
Sources
- Planned Parenthood — general educational material on comfort and body-safe materials.
- Cleveland Clinic — general health information on lubrication and comfort.
- The Gottman Institute — research summaries on talking about preferences.
This article is general education about product selection, not medical advice. If you experience pain, speak with a qualified clinician.
