Here's how to get them for your design.For example,this is an acrylic lasercut data for my Shoji of Methanothermus fervidus.My cat always punches all papers he can,so i'll replace them to DNA engraved acryl to end war.
1.Currently it takes money to know whole sequence of your own DNA.Hopefully may not in close future.
2.You can use already decoded Human genome sample with 33,543,332 digits.
CUGGGGAAAU CUACAGGGCA CCCCAAAAAC UACUGCAGGA
GAGGCCGCUU GAGGGAUCCC CGGGGAAACC UCAAGCGAAU
CUGGGAAGGG AGCGUACCUG GGUCGAUCGU GCGCGUUGGA
GGAGACUCCU UCGUAGCUUC GACGCCCGGC CGCCCCUCCU
CGACCGCUUG GGAGACUACC CGGUGGAUAC AACUCACGCG
GCUCUUACCU GUUGUUAGUA AAAAAAGGUG UCCCUUUGUA
Porcine circovirus(smallest virus): 1,759bp
Human Mitochondria: 16,569bp(13 protein-coding genes)
Candidatus Carsonella ruddii(smallest non-viral): 159,662bp(182 protein genes)
Homo sapiens: 33,543,332bp(about 26,000 protein genes)
and so on.
Step 1: Check Binominal Name
First,visit wikipedia or somewhere to know "Binominal Name" of the spieces you're looking for.Note that not all spieces decoded yet.
Human is too long to view.So let's use Corn,"Z. mays" as example.
It's surely decoded because of its importance in agricultural purpose.
Step 2: Visit NCBI
Visit nucleotide section of National Center for Biotechnology Information,US National Library of Medicine.
Step 3: Search With Query "(Binominal Name)" "complete Genome"
This case,"Z. mays" "complete genome" give you 2 results.2,132,688bp and 3,626,085bp because length of DNA is not unique in one species.
I prefer shorter.Click "FASTA".