Quick answer
Choose Medium Ziq (Soft) if you want a manageable head diameter and moderate stretch. Pick Large Ziq (Super Soft) only if you already handle toys with a 3.25-inch head and prefer a gentler, squishier feel.
Why head diameter matters first
The head of a Ziq is the widest point you need to insert. Medium Ziq has a 2.6-inch head diameter, while Large Ziq jumps to 3.25 inches. That 0.65-inch difference can mean the difference between a comfortable warm-up and an immediate challenge.
If you are still building up to 2.5-inch toys, the Large head will likely be too abrupt even with the softer silicone. Start with the Medium.
Shaft girth and usable length trade-off
Medium Ziq reaches a 2.9-inch shaft diameter with 5.75 inches of usable length. Large Ziq widens to 3.8 inches at the shaft but offers only 7 inches usable. The extra girth comes with a firmer stretch despite the Super Soft formula.
If depth is your priority, the Medium gives you more length relative to its girth. If you crave filling width, the Large delivers that but demands more experience.
Firmness changes the feel of each size
Medium Ziq is offered in Soft (0030), which holds its shape well during insertion. Large Ziq uses Super Soft (0020), making it noticeably squishier. That softness can make the Large feel less intimidating than its numbers suggest, but it also means the toy bends more during use.
If you prefer a toy that keeps its curve and gives consistent pressure, the Medium in Soft is more predictable. If you want a forgiving, plush feel that compresses easily, the Large in Super Soft is the better match.
How to choose your Ziq size
- Check your current max head diameter: Measure the widest toy you currently use comfortably. If it is under 2.5 inches, start with Medium Ziq. If it is 3 inches or more, Large Ziq is a reasonable next step.
- Compare usable length: Medium Ziq offers 5.75 inches of usable length; Large Ziq offers 7 inches. Choose Medium if you prefer a shorter insertable length with less girth. Choose Large if you want more depth and are ready for the wider shaft.
- Decide on firmness preference: Medium Ziq in Soft (0030) gives a firmer, more defined shape. Large Ziq in Super Soft (0020) is squishier and bends more. If you dislike excessive squish, pick Medium. If you want maximum comfort at larger sizes, pick Large. If you are between sizes, the softer Large may still work if you are patient with warm-up.
Ziq models at a glance
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Medium Ziq -- Soft silicone -- Z-604: Medium Ziq in Soft (0030) has a head diameter of 2.6 inches and a widest shaft diameter of 2.9 inches. The head is slightly smaller than the shaft, so you can insert it more easily before feeling the full stretch.
Medium Ziq -- Soft silicone -- Z-604
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Large Ziq -- Super Soft silicone -- Z-603: Large Ziq in Super Soft (0020) has a head diameter of 3.25 inches and a widest shaft diameter of 3.8 inches. The extra-soft silicone compresses more, which can make the large measurements feel less aggressive than a firmer toy of the same size.
Large Ziq -- Super Soft silicone -- Z-603
Which Ziq is right for you?
Best for
- Intermediate users comfortable with 2.5–2.9-inch diameters who want a manageable stretch (Medium Ziq)
- Experienced users who already handle 3-inch+ heads and prefer a plush, forgiving feel (Large Ziq)
Not ideal for
- Beginners or anyone whose current max toy is under 2 inches (both sizes are too large)
- Users who need a very firm, unyielding toy (Medium is Soft; Large is Super Soft)
