Changing pattern for different yarn

If I wanted to knit this, but I do not have any bulky yarn on hand what would I need to do to make this in Worsted or fingering weight yarn? It is a capelet, for some reason the picture did not post. It is a free pattern from lionbrand site
ginny

[B]Lion Brand® Homespun® [/B]

[B]GAUGE:[/B][INDENT]14 sts + 20 rows = 4 in. (10 cm) in St st (k on RS, p on WS). BE SURE TO CHECK YOUR GAUGE. When you match the gauge in a pattern, your project will be the size specified in the pattern and the materials specified in the pattern will be sufficient. If it takes you fewer stitches and rows to make a 4 in. [10 cm] square, try using a smaller size hook or needles; if more stitches and rows, try a larger size hook or needles.[/INDENT][B]STITCH EXPLANATION:[/B][INDENT][B]K1, p1 Rib [/B][/INDENT]

[INDENT][B]Row 1 (RS):[/B] K1, p1 across. [/INDENT]

[INDENT][B]Row 2:[/B] K the knit sts and p the purl sts. [/INDENT]

[INDENT]Rep Row 2 for K1, p1 Rib. [B]Seed Stitch (over an even number of sts) [/B][/INDENT]

[INDENT][B]Row 1 (RS): [/B]*K1, p1; rep from * across. [/INDENT]

[INDENT][B]Row 2:[/B] P the knit sts and k the purl sts. [/INDENT]

[INDENT]Rep Row 2 for Seed st. [/INDENT]

[B]NOTES:[/B][INDENT]1) Circular needle is used to accommodate large number of sts. Work back and forth on circular needle as if working on straight needles. [/INDENT]

[INDENT]2) To keep Collar folded down, button Capelet through both buttonholes. [/INDENT][B]CAPELET [/B]
[B]Body[/B]
Cast on 160 sts.
Work in Seed St until piece measures 2 1/2 in. (6.5 cm) from beg.
Beg with a k row, work in St st (k on RS, p on WS) for 4 rows.
[B]Next Row:[/B] (K18, k2tog) across.
Work even in St st for 3 rows.
[B]Next Row:[/B] (k17, k2tog) across.
Continue working as established, working in St st and dec 8 sts every 4 rows, until only 8 sts remain. Bind off.
[B]Collar[/B]
With RS facing, beg at top right corner, pick up and k 100 sts evenly spaced along straight edge of Body.
[B]Rows 1-5:[/B] Work in Seed st.
[B]Row 6 (buttonhole row):[/B] Work 4 sts in Seed st, k2tog, yo, work even in Seed st to end.
[B]Rows 7-13:[/B] Work in Seed st.
[B]Row 14 (buttonhole row): [/B]Rep Row 6.
[B]Rows 15-20: [/B]Work in Seed St. Bind off. [B]FINISHING[/B]
Fold Collar in half, so that last buttonhole is directly over the first. Sew button opposite buttonhole. Weave in ends.

What is the pattern name and link?

Sorry…here is the link?

Hmm… looks like you start at the bottom and decrease as you go up. So if you figure out how many you need to cast on for the body you could just decrease as much as you need…?

Here’s an easy way to figure out how to start -
The gauge is 14 sts + 20 rows = 4 in. (10 cm) in St st divided into the cast on of 160 sts that would measure almost 48". So take your sts per inch on the yarn and needles you want to use and multiply times 48".

The decrease rows dec 8 sts across, which would be about 2" worth so take your sts per inch again, say it’s 5, and you’d want to dec 10 sts on each dec row. Figure out how many sts you need between decs on your stitch number to get 10 evenly spaced. Then on the following dec rows, knit 1 less stitch between the decs.

Do the same for the rest of the instructions - wherever it gives you a stitch number, convert that to inches and then into the stitches your gauge needs for the measurement.