you can draw dots of varying sizes by adjusting the pressure applied when using

The fine-to-medium 3mm chisel tip provides precision for clean edges

we also sell the Markal Quik Stik in different standard colors here

Not quite what you are looking for

simple design and a tip with just the right thickness

molotow one4all 227hs 6set tropical Juice you can draw dots ofOpaque acrylic marker with a 4 mm nib from Molotow. We offer this marker in many different colours, and all of them are UV resistant on nearly any surface, while also being quick drying. The Molotow ONE4ALL 227HS markers refillable and the nib can also be changed. Refills and extra nibs for Molotow and other sizes can be purchased right here. Colors included in set: 020 Lago Blue, 253 Riviera Light, 206 Lagoon Blue, 235 Turquoise, 254 Olympia Blue &