This is a grown-up shop window.

Name: Medium Knot Dog Dildo
Brand: Sinnovator
Price: 79.99 GBP
Availability: InStock

Goldilocks measures and compares adult toys. Everything here is written in plain words, and none of it is for under-18s.

Take me elsewhere

We remember your answer for this visit only — nothing is stored beyond the session, and no account is needed.

Small Knot Dog Dildo Sinnovator

girth7.5″ usable 6.7″ feelnot published

$77

Medium Knot Dog Dildo Sinnovator

girth9.3″ usable 8.0″ feelnot published

$103

One on top of the other

Both outlines on one axis, at the same scale. Sizes come from the makers’ published girths; where a usable cut-out exists, the profile itself is traced from it. Where they overlap they’re the same; the gap is the difference.

Show a soda can

Small Knot Dog Dildo6.7″ usable · widest shaft point 7.5″
Medium Knot Dog Dildo8.0″ usable · widest shaft point 9.3″

Side by side at the same scale

Drawn to scale: sizes from published girths, and the profile traced from the cut-out where we have one. Point positions along the shaft are approximate.

Show a soda can

How the numbers compare

Differences of about ¼ inch or more are highlighted. Blanks mean the maker doesn’t publish that point.

	Small Knot Dog Dildo	Medium Knot Dog Dildo
Usable length	6.7″	8.0″
Total length	7.5″	9.0″
Widest girth	7.5″	9.3″
Narrowest girth	4.3″	5.1″
Tip girth	4.3″	5.1″
Mid girth	5.5″	6.7″
Knot girth	7.5″	9.3″
Firmness options	not published	not published
Knot	no	no

Which one should you get?

Every line generated from the spec deltas above.

Stepping up from the Small to the Medium adds 1.8″ of girth: 7.5″ around becomes 9.3″.
That’s over an inch in one step. Owners who’ve worked up sizes generally suggest half an inch to an inch of girth at a time, so this is a jump rather than a nudge — the one to be careful with if the Small already sits near your limit.
The Medium is the longer of the two: 6.7″ of usable length becomes 8.0″.
The knot goes 7.5″ → 9.3″ around. On a knotted sculpt that’s usually the number that decides it, not the shaft.
Between the two? There’s no rung between them in the sizes we track for this sculpt — so it’s the Small, or a different sculpt that lands in the gap.

See the Small Knot Dog Dildo → See the Medium Knot Dog Dildo →

The other sizes of this sculpt

Same sculpt, the other steps in its size ladder — each one measured the same way.