Ethernet cord that looks like a telephone cord?

I have a Brother Printer MFCL275ODW. It came with an Ethernet cord that was too short (it was probably about a foot long). I bought a new cord but the part of the cord that attaches to the computer doesn t fit, it s too wide. I bought a telephone line cord (not realizing I needed Ethernet) and it fit perfectly. So... show more I have a Brother Printer MFCL275ODW. It came with an Ethernet cord that was too short (it was probably about a foot long). I bought a new cord but the part of the cord that attaches to the computer doesn t fit, it s too wide. I bought a telephone line cord (not realizing I needed Ethernet) and it fit perfectly. So how can I find an Ethernet cord that fits like a telephone line cord but is longer than 1 foot?
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