SKINNYBUNNY 1'' Rockwool Starter Plugs, Grow Cubes with Seed Holes, Ideal Hydroponics Grow Media, Perfect for Soilless Culture and Transplanting, 2 Sheets of 100 Plugs (100 Plugs Total)

At first they looked smaller than I expected, but they work great. Retains a lot of water. I chose to germinate lettuces in a block of cubes, then plan to rip the cubes apart later. Otherwise the lettuce seeds tend to fall between the individual blocks if you rip them apart first.

Good size for reusable seed starter trays and hydroponic towers.

Tiny. Be warned. One complaint is they tear apart easily. My own fault ordering them.

These Rockwood cubes work great they fulfill their purposes very well. I just poured my chili seeds on top of the whole cube because it was too difficult to put them in each hole. They sprouted tremendously and worked great under inside lighting, but grew phenomenally outside.

These were very small. They did not fill my gardyn cubes. I also did not have much luck getting seeds to sprout. Picture 1, the seeds have been planted for over 2 months. Pic 2 shows how small they are. I had to make holes for the seeds as there weren't any.