The Rupture will consider short fictions of up to 8000 words, though much of the work we publish is considerably shorter. Our tastes are idiosyncratic, but a look at work we've published recently may help.
Simultaneous submissions are fine; multiple submissions are not. If sending very short fiction (less than 1000 words), you may submit up to three such very short fictions as a single file.
Please wait for a response before sending another submission, and please do not submit more than twice during each reading period (March 1 - July 31; October 1 - January 31).