From Crochet at About.com:
Seahorse Free Chart
An Original Designed by Sandi Marshall

These charts are free for your own personal use only. This means that you may make items from my design for yourself or for gifts but you may not sell items which include my design within the item. Selling would be a commercial use, not a personal use, of the pattern.

You may print out one copy of this page for your own personal use. Do not copy further, do not place my charts anywhere else on the Internet or otherwise redistribute the contents of this page (this includes the images). Even if you didn't charge for it, it would be a copyright violation to make reproduced copies available to others without my permission. Instead, if others would like to have the patterns, please give them the URL of this page so that they may come here for themselves. If you like my patterns and would like me to continue creating new ones and making them available to you as free patterns on the Internet, then please follow these simple guidelines. Thank you.

You may also give out the following URL for anyone who would like to have this seahorse chart: http://crochet.about.com/library/blseahorse1.htm - Thank you!

To make a crocheted background to cross-stitch the seahorse on: Starting chain for single crochet is 31. Starting chain for afghan stitch is 30. Make 50 rows.

Working the Chart in Filet Crochet For a 4 dc mesh, beginning chain is 91, plus chain 3, (which will count as first dc of first row), plus chain 2 (which is the ch-2 of first open mesh), for a total starting chain of 96 chains. Begin by working a double crochet in the 9th chain from the hook. Follow chart for placement of solid mesh and open mesh for each row. For a refresher on how to do open and solid mesh, see Basics link below. Chart is worked starting at the bottom right; work first row right to left. Second row is worked left to right. Continue alternating row directions in this same manner, following chart. Approximate finished sizes in filet crochet (once through one chart, worked in 4 dc mesh): With size 5 thread: (192 yards) and a size US 4 steel hook, finished size is about 8.3 inches x 15.8 inches. With size 10 thread: (171 yards) and a size US 7 steel hook, finished size is about 6.9 inches x 12.5 inches. With size 20 thread: (160 yards) and a size US 9 steel hook, finished size is about 6.6 inches x 12 inches. With size 30 thread: (150 yards) and a size US 11 steel hook, finished size is about 6.3 inches x 11.5 inches. With fingering/baby weight yarn: (375 yards) and a size US F hook, finished size is about 21 inches x 36 inches. With sport weight yarn: (435 yards) and a size US G hook, finished size is about 24 inches x 41 inches. With worsted weight yarn: (495 yards) and a size US I hook, finished size is about 27 inches x 46 inches.

Gauge:
With size 5 thread: 5 squares = 1.4 inches, 5 rows = 1.6 inches
With size 10 thread: 5 squares = 1.2 inches, 5 rows = 1.3 inches
With size 20 thread: 5 squares = 1.1 inches, 5 rows = 1.2 inches
With size 30 thread: 5 squares = 1 inch, 5 rows = 1.1 inches
With fingering/baby weight yarn: 5 squares = 3.5 inch, 5 rows = 3.6 inches
With sport weight yarn: 5 squares = 4 inch, 5 rows = 4.1 inches
With worsted weight yarn: 5 squares = 4.5 inch, 5 rows = 4.6 inches

Basics in How to Do Filet Crochet, here: http://crochet.about.com/library/weekly/aa050298.htm

URL for this printing page is http://crochet.about.com/library/nseahorse1.htm

Questions about copyrights? See:
US Government Copyright FAQ - http://www.loc.gov/copyright/faq.html
Copyright Myths Explained - http://www.templetons.com/brad/copymyths.html

For many more charts, see: Index of Free Charts: http://crochet.about.com/library/blfreecharts.htm
Crochet Homepage: http://crochet.about.com