How to Choose Your Panther: Shape, Size & Goal
Panther is the second generation of Kikuchi’s STRETCH system — combining DualDensity™ Silicone Design with ultra-realistic, hand-finished shapes built for different stages of stretching.
The Panther line is not a simple size ladder.
Two toys with a similar maximum diameter can feel completely different depending on where the body widens, narrows, curves, or maintains its thickness.
Choose the shape for what you want to work on. Then choose the size closest to what you already use comfortably.
Choose by Goal
For the most familiar starting point → Base
A realistic human-penis shape that feels familiar and approachable, especially for beginners.
For fullness before the bend → Ace
A tapered front gradually widens into a fuller middle, then narrows again toward the lower body.
For opening and straightening the path → Core
A near-cylindrical body that maintains a relatively consistent diameter through most of its length.
For learning and stretching through the bend → Edge
A deliberately curved body that helps you become familiar with the internal bend and how the path changes beyond the entrance.
For the smoothest progression through the bend → Glide
A fully tapered body with a gently curved head, designed to glide through increasing width progressively.
For bend stretching with a fuller rear body → Hooded
A distinctive foreskin-inspired head, slight taper through the front, then a more consistent thickness farther back.
For depth exploration → Deep
Long, smooth and uncomplicated, with extra usable length as its defining feature.
For stronger deep-stroke stimulation → Firm
Largest at the head and progressively narrower below, creating a different experience from gradual stretching shapes.
Choosing Your Panther Shape
Ace — Fullness Before the Bend
Ace gradually widens after the tip, reaches its fullest point around the middle, then tapers back down toward the lower body.
That shape gives you an easier beginning, followed by a clear sense of fullness before the bend. Once the widest section passes, the narrowing lower half allows the body to continue moving inward more easily.
Ace is a strong all-round choice when you want both stretch and movement without maintaining maximum width through the entire toy.
Base — The Most Familiar Shape
Base is Panther’s most anatomically realistic human-penis shape.
Rather than introducing an unusual taper, curve, or oversized head, it uses proportions that already feel familiar to many users.
That makes Base one of the most approachable Panther shapes for beginners who want to focus on relaxation, movement, and getting used to larger sizes before moving into more specialized shapes.
Core — Open and Straighten the Path
Core uses a near-cylindrical profile with relatively little change in diameter through most of its body.
Instead of creating one concentrated stretch point, it maintains thickness farther along the path.
It also removes the balls and suction base found on more realistic profiles, keeping the lower section clear and straightforward.
Core is designed for users who want to build and maintain a more open, straighter channel rather than focus on a single enlarged section.
Deep — Length First
Deep is defined by two things: length and smoothness.
It avoids pronounced curves, enlarged heads, or dramatic taper changes. The goal is straightforward depth exploration and adaptation to greater insertable length.
Deep is best understood as Panther’s depth-oriented shape rather than a tool designed primarily around increasing width.
Edge — Learn the Bend
Edge uses a noticeably curved body and is concentrated in smaller, more approachable sizes.
The curve is intentional.
It helps users become familiar with the internal bend, learn how the path changes beyond the entrance, and gradually work on opening and stretching through that curved section.
This makes Edge especially useful for beginners who want to understand the bend before moving into larger or more demanding shapes.
Firm — Head-Led Deep Stimulation
Firm reverses the usual stretching taper.
Its head is the widest point, and the body gradually becomes narrower below it.
That means Firm is not designed to slowly open you wider as you move down the toy. You need to be able to take the head first.
Once inside, the larger head creates stronger, more concentrated stimulation during deeper strokes, while the narrower lower body reduces the amount of width maintained behind it.
Glide — Progressive Taper Through the Bend
Glide combines a fully tapered body with a gently curved head.
The head is smaller and less dramatically curved than Edge, helping it move in and out through the bend more smoothly.
From there, the body gradually becomes wider toward the base.
This makes Glide Panther’s clearest choice for progressive stretching: instead of meeting one abrupt maximum diameter, you move through increasing width step by step.
Hooded — Front Taper, Fuller Rear Body
Hooded introduces a distinctive foreskin-inspired head that separates it visually and physically from the rest of the Panther range.
The front section begins relatively narrow, widens, then quickly tapers back down after the fuller point.
Farther back, the body becomes more consistent in thickness rather than continuing to taper heavily.
In simple terms, Hooded combines an easier transition over the front section with a fuller rear body designed to maintain stretch farther through the bend.
Choosing Your Panther Size
Not every Panther shape is available in every size, and the exact measurements of the same size label can vary between shapes.
Always check the actual diameter of the specific Shape + Size combination before ordering.
XXS / XS — Learning to Relax
Usually below 4.5 cm maximum diameter
These selected smaller sizes are intended for users who are still becoming comfortable with larger toys, relaxation, and sustained movement.
They provide an approachable way to begin exploring Panther’s supported structure without making a large jump in width.
S — Beginning Structured Stretching
Usually around 4.5–5.5 cm maximum diameter
S is generally suitable for users already comfortable with conventional penis-sized toys and beginning more deliberate stretching.
M — Building Noticeable Stretch
Usually around 5.5–6.5 cm maximum diameter
M introduces substantially more fullness and makes differences between Panther shapes increasingly noticeable.
At this stage, choosing the right shape becomes just as important as choosing the diameter.
L — Experienced Large-Toy Use
Usually around 6.5–7.5 cm maximum diameter
L is intended for users already comfortable with significant width.
Two L-size Panthers may still feel very different because head size, taper, belly, curve and usable length distribute that width differently.
XL / XXL — Advanced Stretching
Usually above 7.5 cm maximum diameter
These sizes approach dimensions associated with advanced stretching and fisting preparation.
They should be selected according to what you can already use comfortably rather than simply as the next label in the sequence.
VIEW THE FULL PANTHER SIZE CHART →
Shape Matters as Much as Size
Progress does not always mean moving directly from M to L or from L to XL.
Sometimes changing shape at a similar diameter teaches your body something that simply choosing a larger version of the same shape does not.
You may use:
Base, to become comfortable with a familiar profile.
Edge, to understand the bend.
Glide, to progressively open through it.
Core, to maintain a more consistent open path.
Deep, when length becomes the next goal.
......
The Panther system is designed so that size describes how large the challenge is, while shape determines where that challenge happens.
Find Your Panther
Start with what you already use comfortably.
Then ask yourself:
Where do I want the next challenge to happen?
At the entrance?
Before or through the bend?
Along the full path?
Or farther into depth?
Choose the Panther shape that answers that question, then choose the size that matches your current ability.
Need Help?
support@kikuchitoys.com
X: @KikuchiToys
The goal is not simply to take something larger. It is to make what once felt difficult become familiar.
Rock O'Yang
Co-founder of Kikuchi®