Here is a nice step-by-step flower you can use to crochet this sandal...
To begin, wrap the yarn around your finger once and make a magic ring. If you're not familiar with the magic ring, you can just work into the first slipknot.
Start by working round 1 into the magic ring. Here I have chained 2 and am about to hdc into the ring.
Work the first round into the ring.
Round 1: Ch 5 (counts as hdc, ch2), (hdc, ch2) in ring 5 more times, sl st in 3rd ch of beginning ch to join - 6 ch- 2 sps.
To make the first layer of "petals." work the stitches of round 2 into the ch-2 spaces.
Next, you will work the same stitches into each ch-2 space around to form the petals. Generally, when I am designing flowers, I like to go from a short stitch (like a sl st, sc, or hdc) to tall stitch (dc, tr) and back to short again in the same space.
Round 2: (Sl st, hdc, 2 dc, hdc, sl st) in each ch-2 sp around, sl st in first sl st to join-6 petals.
Turn to work on the back side of the flower for the next step.
This next step is where it can get a little tricky. You're going to work the next round on the back side of the flower. Ch 1 to prepare. If you like, you can also fasten off the yarn from the first set of petals and change colours, as illustrated in the next steps. If changing colours, join the new colour around any dc post from round 1.
On the back side of the flower, make a single crochet around the first double crochet from round 1.
Begin by bringing the hook under the post of the dc, yar over, and draw a loop to the side of the post closest 5o you. Bring the hook over the dc post, yarn over, and draw the yarn through the 2 loops on your hook. Work around 3 into the dc posts of the first round.
Round 3: Ch 1, sc around first dc from round 1, ch 5, (sc around next dc from round 1, ch 5) 5 times, sl st in first sc to join-6 ch-6 loops.
Here I have completed one sc around the first dc from round 1, chained 5, and am about to complete the second sc (around the 2nd dc from round 1).
Once you have completed round 3, this is what the back of your flower will look like.
Turn bact to the right side of the flower and work round 4 into the ch-5 loops you just created on the back side of the flower.
To make the second layer of petals, you'll work into the ch-5 loops you jut created on the back side of the flower. Work round 4 with the right side of the flower facing you, as shown above.
Round 4: (Sl st, hdc, 5 dc, hdc, sl st) in each ch=2 sp around, sl st in first sl st to join-6 petals
And there you have it - a simple crocheted flower!
Leave a long yarn tail to crochet the flowers together, the sip around the toe and ankles as seen on the photos.
OR
simple just make your own with beads and shoelace...
(Watch this video for more ideas)