In Blender, add a circle. I'm making the radius of the circle one and a half millimeters, which makes the diameter three. That is about the size of a toothpick plus a little bit of room to spare.

Hit extrude (usually E) and then escape to extrude extrude new vertices, but not make them go anywhere. Scale the new verticies (usually S) out until they look like a good size. Next, extrude the whole thing up fifteen millimeters. This is also an arbitrary number, but it seems to fit. View the model from the top view and make sure you're an orthographic not perspective mode. This makes it a lot easier to work. Select just a few vertices on the side and extrude them out again aling the X-axis by whatever amount looks good. Also a fairly arbitrary amount. With just the end of the flag selected, scale them to zero along the x so there is a flat end.

Add some text and rotate it around the X so that it's upright and aligned with the flag. Edit the text to be a numbr for the flag. Press Enter and add a period for the dots that represent how common that number is.

Under the text options, set the line spacing much lower so the dots are brought up into a nice position. Also change the horizontal spacing to centered, so it looks nice and is consistent. Scale the numbers up so they look like they are in the right spot, then modify the flag itself so the whole thing looks to your liking.

To give the flag just a little more style, press CTRL + R to put in a loop-cut around the middle of the flag and press ESC to centre the cut. This will give you some extra verticies to move around for style

Go through and create the numbers for all of the the different tiles. Remember to update the dots for each number too. Once all your numbers are created, go into object then convert to mesh using the Convert menu. This will take all of your numbers and give them vertices as a mesh instead of as a text object which lets you modify it easier. Select all of your numbers and hit tab to go into edit mode. In blender 2.8, you can edit multiple objects at once, which makes this step MUCH faster. Extrude the numbers so they stick out the front of the flag. Then, duplicate the numbers and their dots and rotate them 180 degrees around to the back-side of the flag.

We need to add a boolean to combine the numbers and the flags. This is super important if you're 3d printing. When you're 3d printing you, can't have different intersecting bodies. A lot of slicers will have problems with that. Select one of the numbers and add a boolean modifier. Make the operation a union and choose the flag object. To apply this to all of the numbers, select all of the numbers (and the one with the modifier last) and press CTRL + L. Choose modifiers. This will copy the modifiers from the one mesh to all of the others.

We need to export them each as their own STL to be 3d printed. Go to file > export STL. In the options, you need to set batch mode to the object. This will export each flag as its own STL file. This is much faster than doing one at a time.