Nº 01 / Pebble
Starter
The Pebble
Six stones. Kraft carton. For the curious, the sceptical, or the dinner guest. Slate.
Engineered for legend
The skipping
stone.
The right stone. Engineered to skip. Finally.
Start skipping →§ 01 — The collection
Three packs.
One stone.
Every stone is the same — 60mm disc, 5mm thick, polished edges, one grip dent. What changes is the quantity, and the vessel it arrives in.
Nº 02 / Classic
Most popular
The Classic
Twelve stones. Linen drawstring pouch, hand-stamped. The default gift. Slate.
Nº 03 / Boulder
The tin
The Boulder
Twenty-four stones. Aluminium cookie tin, 23cm. You were hoping for cookies. Marble.
§ 02 — The Boulder
You were hoping
for cookies.
Every house had one. Round aluminium tin, lived on a shelf, looked promising. You opened it as a kid expecting shortbread. It had a pincushion in it, a thimble, some buttons from a coat that no longer exists.
Ours has 24 perfectly engineered skipping stones in it. Arguably better.
§ 03 — The science
Four variables
matter. We got them right.
The physics of a skipping stone is, as it turns out, reasonably well understood. A stone skips when it meets the water at a shallow angle and spins fast enough to stay flat against hydrodynamic lift.
The literature converges on four levers: angle of attack (~20°), spin rate, edge geometry, and the stone's mass-to-surface ratio. We tuned the last three. You provide the first.
1 Clanet, C., Hersen, F., & Bocquet, L. (2004). Secrets of successful stone-skipping. Nature 427, 29.
2 Bocquet, L. (2003). The physics of stone skipping. American Journal of Physics 71, 150–155.
3 Rosellini, L., Hersen, F., Clanet, C., & Bocquet, L. (2005). Skipping stones. Journal of Fluid Mechanics 543, 137–146.
4 Nagahiro, S., & Hayakawa, Y. (2005). Theoretical and numerical approach to ‘magic angle’ of stone skipping. Physical Review Letters 94, 174501.
5 Truscott, T. T., Epps, B. P., & Munns, R. H. (2009). Water-skipping spheres. Physics of Fluids 21, 091103.
6 Hewitt, I. J., Balmforth, N. J., & McElwaine, J. N. (2011). Continual skipping on water. Journal of Fluid Mechanics 669, 328–353.
7 Belden, J., Hurd, R. C., Jandron, M. A., Bower, A. F., & Truscott, T. T. (2016). Elastic spheres can walk on water. Nature Communications 7, 10551.
8 Johnson, W., & Reid, S. R. (1975). Ricochet of spheres off water. Journal of Mechanical Engineering Science 17(2), 71–81.
§ 04 — Simulator
Throw a stone.
Watch it fail.
Physics-based simulation of skipping stone dynamics. Adjust the stone, adjust the throw. Every variable the papers identified — then watch the curve sag.
Stone spec
Diameter75 mm
Thickness8 mm
Mass70 g
Throw parameters
Speed15 m/s
Attack α20°
Launch β6°
Spin Ω80 r/s
Presets
Skips
—
Distance
—
Max height
—
Min speed
—
flight phase
water contact
water surface
Adjust parameters and press Run.
Lift force: F = CL,eff · ρw · vx² · Swetted · sin(α + β) after Clanet et al. (2004). Attack angle efficiency: quadratic penalty away from 20° magic angle. Spin degradation: Ω decays 12% per bounce; effective CL degrades via Δα = 0.0248 + 1516 · Ω−2 deg/bounce (Tang et al. 2021). Integration: semi-implicit Euler, dt = 50 μs.
References: Bocquet (2003) · Clanet, Hersen & Bocquet (2004) · Tang et al. (2021)
§ 05 — About us
We found the paper.
We read the paper.
We didn't fully understand the paper.
But we built the stone anyway.
Two founders · Barcelona · 2026
§ 06 — The record
88
skips in a single throw.
Kurt Steiner · Pennsylvania · 6 September 2013
§ 07 — Early praise
Look — I skipped a rock. It went across the water. I don't know what else you want from me.
The tin alone is worth it. I put my jewellery in it. The stones are in a bowl. Both things are true.
I hate to admit it but it does, in fact, skip better than a rock from the beach.
I got seven skips on my first throw. Seven. I've been trying since I was eight years old.
Bought it as a joke. Kept it because it's genuinely the most beautiful object on my desk.
My six-year-old beat me. The stones don't care about your ego.
§ Start skipping
One stone.
Perfected.
From €14. Ships anywhere in Europe.
Choose your pack →