Tutorial: Round scalloped edged table cover

Al fresco dining is on my mind these days.  Here in Northern California, the weather is phenomenal almost all the time, but the draw to go outside to eat is particularly strong now, with evenings warm and light enough to be out at dinnertime.  And it's strange for me, coming from upstate NY, but there are almost no insects here!  So, as a bonus, eating outside is not a battle with mosquitoes and deer flies!  Wahoo!  To brighten up our dining space, I love the look of Mexican oilcloth--it's colorful with some cute designs, but it's also water-proof and fairly inexpensive.   I've seen lovely tutorials for square or rectangular tables, but we have round ones, so I've put together some instructions for making a custom, fitted tablecloth (with a cutie scalloped border) for your round table.



Materials:
Mexican oilcloth (amount will vary, depending on the size of your table)
Ruler (I like this one)
Kitchen twine
Pencil
Calculator
Scissors, rotary cutter, self-healing mat
Standard sewing stuff--machine, straight pins, thread, etc.

Measure your table:
Take the diameter measurement of your table (make sure you are taking it at the very widest point).  Add 1/2" to this measurement to account for the 1/4" seam allowance for both sides.   Note: if your table diameter + seam allowance is greater than the width of your fabric, you will have to make two half-circles and sew them together (don't forget the seam allowance!). 

If your table has an apron (or edge) that you want to cover, measure the minimum needed to cover it.  We will be adding more to that measurement to take into account the length of the scallops, but we'll do that later. 

Cutting fabric:
Fold your fabric in half, then fold again (to make it into quarters) ensuring the edges match up perfectly. 

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Folded in half (fold at the bottom)

Folded in half again (fold at right side)

Using your diameter (+ seam allowance measurement), divide by 2.  That's the radius (remember high school geometry?  It's back!)  Take your twine, and make a little loop in it, measure out the length to be equal to that of the radius and put your pencil point in the loop.  Holding the other end securely at the corner of your folds, trace a quarter of a circle on the oilcloth.  Double-check that you hit your radius length on both sides of the fabric.  Maybe check it again :)

Trace the arc of your circle using the string and pencil

Cut along the line through all thicknesses of fabric, being careful to keep the folds together and edges lined up.  It's a bit thick to pin, but it if you can, it will make it easier.

There it is, a perfect circle!

Next, you need to calculate the length of the strip to go around your circle.  Length around a circle (circumference) is equal to circle diameter x pi (3.14).  Use the real diameter, not including the seam allowance.  If you are skeptical of the value you get with the calculation (I was!) use your tape measure to prove it to yourself.   Next determine how much to add in seam allowance.  Chances are, you won't be able to get the full length of your strip from one length of fabric.  For this table, I used two shorter strips to make the full length.  Therefore, it will take 2 seams to make the circle.  For EACH seam you need, add 1/2" seam allowance to the circumference measurement. 

Scallops, next.  Mine were 4" wide.  Incredibly, this measurement created equally spaced scallops around my table, but if yours does not, divide the circumference (do not include seam allowance) by the desired width of scallops.  Evenly spaced is great, but keeping a whole number makes life easier down the road. 

With length taken care of, you next need the width (drop) of the strip.  You measured the minimum length for the drop of the tablecloth, but you will be making cute scallops.  I made scallops that are 2 inches long (4 inches wide), so add 2" to the width measurement.  Then, add 1/4" for seam allowance.  My strips were 4" in width (1.75" minimum cloth drop + 2" for scallops + 1/4" seam allowance).

Cut your strips using a rotary cutter and self-healing mat.  On the wrong side, make a line 2" from the edge down the length of the strip.

My flexible ruler (shown above) has tiny holes every 1/2", so holding a pencil point in one (pivot point) and a pencil point in another 2" away and tracing the arc creates perfect semi-circles of the desired width.  Yay!  You can also use the string method (above) or a dish with a diameter of 4".  Start in 1/4" (for seam allowance) from the edge, then measure 2" and mark with a dot.  Make your arc.  Continue on...and on...

Notice the 1/4" seam allowance on the left, before the start of the scallop

Once you get a few scallops sketched out, cut the fabric and lay the cut fabric on the rest of the strip to make a template.  Trace the outline, then cut.  

Next, connect the strips to make a circle.  With right sides together, pin at the short ends.  You should have left 1/4" on the ends so your scallops remain the proper size (see below).

Once the strips are connected, finish the edge of the scallop with a zigzag, double-backing at each indentation to prevent ripping of the fabric during use.  Check that it fits around your table.

Make the 12 - 3 - 6 - 9 o'clock positions on your perfect circle (fold in quarters and clip at the fold).  Then clip at the quarters of your circular strip.

Clip at the fold to mark the quarters of your circle

With right sides facing, pin the circular strip to the circle piece, matching each clipped point.  You will need to make shallow clips (less than 1/4 in length) along the entire edge of the circular strip to get it to fit the curve of the top.  Pin copiously!

Sew 1/4" from the edge.  Make sure your seam line is further inward than the clips along the edge or you will see them when you turn it. Turn right side out and fit it onto your table.  Yay!