For this pattern, I prepared 6 files.

Fireflies_Int_bottom_up.pdf -
Interlocking filet crochet bottom up

Fireflies_Int_bottom up with
border.pdf - Interlocking filet
crochet bottom up with the border in
the round

Fireflies_Int_in_the_round.pdf -
Interlocking filet crochet in the
round

Fireflies_Overlay_Mosaic.pdf - Overlay
mosaic crochet bottom up

Fireflies_Overlay_Mosaic with
border.pdf - Overlay mosaic crochet
bottom up with envelope border in the
round

Fireflies_Overlay_Mosaic in the
round.pdf - Overlay mosaic crochet in
the round

In each file there is an introduction, writing pattern and charts.

Hook 3.25 – 3.5 mm. Hook size needed to match the gauge.

Yardage approx. 4000 meters of Sport weight yarn for each of your two colors, which is a total approx. of 8000 meters of yarn (4300 yards per colors, a total of 8600 yards of yarn, 1500-1600 g for each colors)

Size: 150 cm wide and 210 cm long (59 inches wide and 82 1/2 inches long).