
Both the Pemberley and Masala slippers can be customized in length to fit your foot. Masala is easiest to adjust whereas Pemberley is somewhat constrained due to the repeats of the lace. In order to customize the slippers though we need to understand what the vamp is.
From dictionary.com:
vamp
noun
1. the portion of a shoe or boot upper that covers the instep and toes.
In this case, I apply the term vamp to the portion of the slippers that is worked in the round without any shaping. The two pairs of Masala in Nourishing Knits have two different vamp lengths - 1″ (purple and gold) and 2″ (teal and gold). The vamp length impacts the look of the slipper as well as the fit.

The longer the vamp, the more secure the slipper is on the foot and the more casual the look. A deeper vamp can make it more effort to get the slipper on, so make sure the slipper length before starting the vamp is at least as long as the measurement from the back of the heel to the front of the arch. For most, a vamp depth of 1-2″ is recommended. Less than that and the slipper is likely to fall off the foot.
So once you’ve decided on your desired vamp length, you need to figure out how long the toe section will be at your row gauge as well as the desired total length of the slipper to know when to begin the vamp. Since it can be very difficult to match row gauge it is important that you check your row gauge now. If you don’t already know the total length of your foot, take that measurement too.
Slipper Length
For a nice snug fit, you want the slippers to be about 10% shorter than your foot length. To calculate that, just multiply your foot length buy 0.9.
SLIPPER LENGTH = FOOT LENGTH X 0.9
Toe Length
Figure out how many rounds will be worked in shaping the toe. I did that for you already in the sidebar in the Masala pattern - 15 rounds. For Pemberley, I give you the toe length in inches if your row/round gauge match that given in the pattern (11 rnds per inch). If your gauge doesn’t match, you’ll need to read the pattern to figure out how many rounds are worked in the toe shaping.
Shape toe: Dec rnd: *K2tog, knit to last 2 sts of needle, ssk; rep from * 3 more times — 8 sts dec’d. Rep dec rnd every other round 5 (6,7) more times — 8 sts rem.
That means you have 1 (1, 1) rnd, plus 5 (6, 7) decrease rounds, plus 5 (6, 7) rounds worked evenly in between the decrease rounds for a total of 11 (13, 15) rnds in the toe.
The toe length in inches will be the number of rounds in the toe divided by your round gauge.
TOE LENGTH = TOE RNDS / RND GAUGE
Foot Length
Now that we know the total slipper length, the desired vamp length and the toe length we can figure out how long the foot of the slipper should be before we join for working in the round. Simply take the total slipper length and subtract the vamp length and the toe length.
FOOT LENGTH = TOTAL SLIPPER LENGTH - VAMP DEPTH - TOE LENGTH
For Pemberley Only
Due to the lace edging and needing to end a repeat at the same point you have some constraint on the foot length which means a little more math and possibly changing the vamp depth to maintain your total slipper length. The first step is to figure out how much foot length a repeat of lace edging adds. Again you’ll need to your row/round gauge. You’ll take the number of rows in a pattern repeat (8) and divide by the row gauge.
PATTERN REPEAT LENGTH = 8 ROWS PER PATTERN REPEAT / ROW GAUGE
For the total number of pattern repeats to work, simply divide the foot length by the pattern repeat length.
# PATTERN REPEATS = FOOT LENGTH / PATTERN REPEAT LENGTH
Chances are you got a crazy number as your answer. If you opted for a vamp depth of less than 2″, round down to the nearest whole number. If you were aiming for a 2″ vamp it is probably safest to round up.
With this rounding of numbers your actual vamp length may need to be adjusted. So, figure out what the new foot length will be first by multiplying the number of pattern repeats by the pattern repeat length.
NEW FOOT LENGTH = # PATTERN REPEATS X PATTERN REPEAT LENGTH
Using this new foot length and the toe length we can determine the actual final vamp depth you’ll need to work before shaping the toe. Simply subtract the new foot length and the toe length from the total slipper length.
ACTUAL VAMP DEPTH = TOTAL SLIPPER LENGTH - NEW FOOT LENGTH - TOE LENGTH
When working Pemberley do stop at the same point in the final pattern repeat as is instructed in the pattern - after a row 7. You’ll set up the extension of the lace edging that will run across the top of your foot on the final row 8 of your last pattern repeat.
As usual, please feel free to leave any questions in the comments. Go ahead and finish your slipper foot section and the extended edging. The next KAL post will be the set up for working in the round.