There are soooo many sampler quilts out there, some free designs. Even if you want to design your own, do a google image search on "sampler quilt" and make notes on the elements you like and dislike. There are many different types of sampler quilts.
just grabbing a few images at random ....
Some sampler quilts have various blocks that have similarities in design and/or color - each block is the same size with or without sashing, some set straight and some on point. Sometimes there is one large center block with smaller blocks surrounding. [ATTACH=CONFIG]586779[/ATTACH][ATTACH=CONFIG]586780[/ATTACH]
Other sampler quilts have a mish-mash of block types and sizes (including long rectangular blocks). These sampler quilts *typically* share the same background fabric to give the illusion the blocks are all floating on the same background and the blocks typically have color/fabric in common throughout. For example ... a dozen shades of blues with white on a white background.
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And then there are sampler quilts that have a common theme ....
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Lastly ... there is the mother-of-all sampler quilts ... the Jane Stickle quilt, aka "Dear Jane". You can buy this pattern, along with the software to help you design and make the quilt.
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So ... what kind of sampler quilt did you have in mind??