I think it would snap in a number of places if it were smaller (jewellery size).
I'm no expert, by any means, but the J,S,S have weaker spots at the top and base of J, base of both S's.
I also have a concern about the E ending into the S, although I think that might be ok, since there are other supports.
The base of the J is the only thing holding onto the entire top left half, (because of the cutaway at the top).

Further Questions and development areas :

• How big is this? it looks to be a P2 or P3? What measurements have you done? ATM this looks massive. Do you have a scale ratio and key?
• Why is it straight angles? is that deliberate? Would curves be better for the style?
• Also, clean up some of the double lines. That'll cause problems with cutting. (internal of the J, little nobbly bit at the top halfway between J and hole, top end tail of the fish)
• What material are you planning on making it out of? 

wow thanks for all this!!! I am somewhat new with this and yes it is a P3 what would you recommend as jewelry size? and what about a scale ratio and key.  not sure about material yet ..... thinking maybe the bamboo or the plastic 

• Ok, first, what program are you using? I'm guessing Corel Draw or Autocad?
• Scale ratio = what size you want it, compared to what is actually displayed. Scale Key is a visual determination for comparisons. You probably won't need it, if you don't know what it is. :-) However it will help others to see how big you are intending for this.
• This is the measurement of a P3 : 790 x 384 mm OR 31.1 in x 15.1 inches. Are you sure you want it that big? Jewellery size is usually between a half inch and about 3 inches.
  

I'd suggest you figure out what size you want to make it, or them (and it doesn't have to just be one size either, but start with something small - go slow and master what you want to do). If you have access to a printer, print it out at realsize (100% zoom/actual size). Libraries often have printers if you don't have access. Email it to yourself.

You need to rework the designs to eliminate the weak spots. See if you can do the same sort of design, more balanced on where the hole and connections are. Tip : fill it to see the shape, don't work in lines just yet - do that last. Fill it, Print it out, and turn it upside down from you, then look at the path and spacings. Turning it upside down will allow you to see it for what it is and the balance of it, without getting distracted by the letters.

I am using Inkscape program 

Haha! I completly missed that one. :)

here is something a bit different but done to about 3.48 

That's better. Check your designs though, especially the corners and line intersections. Some of the lines are not matching up and will do weird things to your laser cuts.

• bottom heart, top of bottom hole. both sides. The lines are not meeting up.
• middle heart, centre hole, top-right side intersection
• middle heart, centre hole, top-middle point 
• middle heart, centre hole, lower-middle point, little jagged edge there
• middle heart, centre, outside left edge. jagged edge and unmeeting lines.
• middle heart, centre, outside right edge. jagged edge and unmeeting lines.
• top heart, left rounded outside edge. Jagged.
• top heart, outside edge, heart dip intersection. unmeeting lines.
• There may be more. Double check your work. :-)

• Make the holes as if they were a single piece.
• Also, are the straight lines deliberate? everything you do will be replicated, so if you want straight lines, use straight lines. If you want curves, then use curves.

Keep going, you're doing well.